Guardian Security...locally owned…read more Friendly, prompt, knowledgeable & reliable. By Joe Duncan ,retired after 50 yrs in security.

Guardian provided top-quality products, installation, and service for us! Several technicians…read moreperformed the work, they were all great - hard-working, knowledgeable, and polite. They patiently helped us learn the features of our system. Also did a fantastic job mounting our TV! Office staff is wonderful as well. Excellent experience overall. I would highly recommend Guardian Systems!!!

I just made the move to NCA and could not be happier so far. They called ahead to get permission to…read morecome earlier than scheduled. They figured out the best upgrade to my panel. We moved up to cellular and they set me up for the mobile app to control my system. Now I get the best value for my monitoring. John and Sam were exactly the guys to trust to set up your security. Shooter... these guys are keepers!

Great service provider at great cost. Been with NCA for over ten years. ADT is very expensive.read more

This company is continuing to charge my card for services that I discontinued in December of 2024…read more I have numerous emails, calls, and texts requesting cancellation, however, despite this - I'm still being changed for service for 6 months since moving from my home. Do NOT work with them. It started well but it's been terrible trying to leave. They are BARELY responsive and don't follow through with what they say they will do.

I requested a quote through yelp nearly 2 1/2 years ago, and mike got in touch with me right away…read more In no time he came out and had us up, running, and fully secure. Never, ever had a problem with them. I mean, they are on the ball. I've set it off plenty of times...especially at the beginning...and if I don't get that alarm off pronto, they are calling me, my husband, and then kids in that order... Never had to reach the cops. Once I was home alone and my alarm went off...scared me to death...they called and I kept them on the line as I tiptoed towards the door it said was ajar. It had been the walk door of the garage,and my husband didn't close it good and tight...the wind had blown it open, tripping the alarm. Just very pleased. Wish I was this pleased with other Nashville service providers.

So earlier this month I had an eroneous charge from Unlimited Security. I promptly reached out to…read moreLinda, who put me in contact with her book keeper who got straight to work on resolving it. I am so grateful for the great local service I get from Unlimited Security, and while it too just over a week to get things sorted out, everything was fixed and put back in it's place in a timely manner due to the tireless efforts their bookeeper. I have no plans or reason to take my busienss elsewhere because the service provided by Unlimited Security at all levels is excellent and the standard by which I hold all other service providers I deal with to.

Unlimited security provided great, timely service and installation. I feel confident that if and…read morewhen we ever need any service from them they will be right there to help!

I recently moved from the Nashville area and I wish I could have taken Duncan Security with me. I…read morewas very pleased with their company and would highly recommend them. Jody was great helping me with our initial needs and the techs that came out to install the system were professional, willing to answer all of my questions (numerous times until I understood), and very knowledgeable about what they were installing. Another thing that was very important to me was the response time for the call center to contact me when the alarm went off (accidentally numerous of times). It was quick. Within seconds. Thankfully they were false alarms but I knew if I had an emergency they would be quick to respond. AND the call center in US based. The previous person who left a review talked of the contract and not having their money reimbursed. Note that the person broke the contract and didn't have to pay the additional year that really they could have held them to. I'd say that was pretty generous. My experience is that they will work with you if something out of the ordinary comes up - an unexpected move so on and so forth. One thing I don't understand is Yelp shows only one review but if you click on the "reviews not recommended" you will see other reviews and they are all 5 star. I recommend reading those reviews when making your decision. Thank you Duncan Security!

There is no finer man than Joe Duncan, Jr. He and his team have provided security for my home for…read more25 years. They offer the best in customer service, intelligent planning and installation, and monitoring. I had a question about my system today, and Joe, the OWNER HIMSELF, was here within 30 minutes. Questions answered. My problem(not a systematic one), resolved and I could not be happier. Thank you Duncan Security for the sense of safety and protection you provide. Robin

I bought a home in March 2025 where the previous owner had Flex Alarms. We were told by Trent…read morePercival, as was the previous owner, that we could take over the remainder of their contract so they wouldn't be penalized. (March-Sept 2025; they had already paid for 2.5 years) They acted as if this was helping us both out. Then Trent would tell me we will be there on a day at a certain time without asking me first. I had to tell him 3 times that didn't work for me and he couldn't just tell me when he was coming. Once they showed up unscheduled at 7:45am and he texted me that the tech was here. I was leaving for work. 3 other times a tech, Zach, was supposed to come and didn't show up. The front door sensor was broken so it was silently setting the alarm off which wasn't even armed so the police came and multiple times we had to call them off from coming. Jim Anderson, the owner reached out to inform me that if I didn't pay, even though we never had service or even set the alarm, he would be turning me over to his attorney. I explained the situation and even sent him texts proving all this. He said they didn't do anything wrong and asked if we could reset. He didn't care about us or that we were told lies, misinformed, or were trying to help the previous owner not be penalized even though they moved 6 hours away! He has told me I'm not honorable, I'm not following through, and that I will be paying his attorney's fees and costs. Buyer beware!!

One of the worst companies I've ever worked with. Customer service was horrible. I had to be the…read moreone initiating contact every time. Company customer service will never accept any blame and try to pin it on anyone else they can. Trent Percival was looking to make a quick buck instead of trying to actually help. Never reached out to help until I persistently called to get something done. Wouldn't recommend to anyone looking to have someone that does that their with pride and honesty

Today (08JUN20 - Mon) Hugo, alarm technician from Preventia Security of Columbia, TN arrived at my…read morenew home addition on-time and ready to work. Hugo called me first to confirm our appointment (that is a huge "plus" in my book when dealing with technicians knowing they are on the way!) and WAS ON TIME! After Hugo installed the alarm / smoke detector items and keypads, he explained how to use the system fully without "rushing or glossing over" what I needed to know. My work order was not a large dollar amount one and they were "tying into" an existing alarm system. Most alarm companies would probably have tried to "up-sell" me a new, costly alarm control panel or quoted an outrageous price just to get me to decline and look elsewhere . I would like to applaud Preventia Security for sending an alarm professional to attend to my alarm / smoke detector needs. Hugo is a valued team member and an asset to Preventia Security in my opinion. I also would like to acknowledge John, their salesman and Sarah, their scheduler who assisted me in this small, but important alarm / smoke detector job. Both John and Sarah were also tops in their game in terms of communications and responsiveness! Folks, I am pretty critical when it comes to service, value and communications with sales and service related companies. Without any reservations, I can honestly recommend Preventia Security of Columbia, Tennessee for a value priced, headache-free installation of your alarm / smoke detector system. Thank you Preventia Security!

Michael Beets was punctual (actually early!) and very knowledgeable and explained the issue well.read more

Highly recommend…read more Aaron and team have done all the A/V work throughout our home. Most recently they installed TV and sound system on a new stacked stone fireplace. They are not inexpensive, but we'd never consider anyone else handling any of our A/V needs. They are extremely knowledgeable, great communication, thorough, very detail and accuracy oriented.

I highly recommend Electronic Insiders for mounting your TV, installing home theater, whole house…read moreaudio, Wi Fi systems, etc. Years ago, the very personable owner, Aaron, installed my system and did a great job at a reasonable cost. Unlike other providers through the years, I have never been abandoned for service needs in lieu of more profitable customers. Just today I had a silly "user error" issue and he promptly sent his terrific young colleague to help me out. I will remain a client for life.