I had used SGC twice in the past 18 years with satisfactory results, so the very bad experience on…read morethis 3rd time came as a shock, and makes me wonder if it is even the same SGC, though they claimed to me over the phone they were. I wondered because the first two times they were local to where I live in Redondo Beach, CA, but this time I noted they were in Napa, CA. But they said they knew me, so I asked them to send someone to my house to repair or replace my garage door opener. Someone did come to my house, but they were not SGC, but instead were branded something generic, "Garage Door Repair & Install. These guys said they were dispatched to my home by SGC, so I went with it. They charged me $3500 for a $400 Liftmaster 2420L opener, plus labor. The labor charges were reasonable, but the $3000 overcharge for the opener was egregious. Then they had the nerve to tell me they would charge an additional 3% for paying with a credit card. I blame this on SGC because I verbally contracted with SGC, not these guys. But SGC refuses to talk to me, and they hang up their phone when I call them. I already wrote a review for the folks who came to my house. They have numerous bad reviews if you google their phone number, including 12 complaints with the Better Business Bureau (BBB). Those folks operate under different names (hence the useless, generic name they gave me on the invoice with no address), but if you do an internet search for their phone number, you find them on sites such as Yelp, Angi's list, and BBB, with many complaints similar to mine. But this review is for SGC. SGC was obviously in cahoots with these guys for several reasons. First, it was SGC that dispatched them to my home. Second, when I first called SGC to get an explanation for the 700% markup on the new opener, they acknowledged the dollar amount I was charged, and tried to explain it away, and then said their boss would call me back. I had several rounds of phone calls, each time they promised me the boss would call me back. After several days of this, they now just hang up on me. Third, I emailed them from their home page where you request services, but I never got a response. Fourth, the email address listed on their home page is bogus. And fifth, the first two times I contracted with SGC in my local neighborhood, they listed a California business license. This time they don't. Stay away from SGC would be my advice.