Diamond has treated me well. They are on the ball for me at least. I rent 2-4 times each month so there is quite a volume with my account. I recently purchased a trencher from them at a yard sale and within three uses it quit driving. I dragged it onto the trailer and took it to them to look at. They told me that it would need a new chain which was going to be $1300 and then they didn't know how much to fix the drive. I gave them the go ahead and they tore into it. I got a phone call a few days later and they said that fixed the drive for just under $200 but that they misquoted me on the chain assembly and it was actually going to cost $3,000 or more. I told them to not do it but that I would just use it till it fell apart and scrap it. They said that is what they figured too. I sent one of my guys to go pick it up and he called me and said that they were giving him a pile of parts, that it wasn't assembled. I talked to the service guy and he said that I declined to fix the chain. I told him that it was working when I gave it to him and that I expected it working when I picked it up. He told me that it wasn't going to last long in that condition and it wasn't worth the expense to put it back together. I told him it was his fault for quoting me the wrong price, and that I wouldn't have done either of those repairs if I had known that it was going to cost $3k. I asked him how he was going to charge me $200 for a repair to a pile of parts. He told me that I had authorized the drive repair but not the chain so that is what I get. I asked to speak to the manager and told him that I didn't want to pay for a repair to the drive when the machine was useless. He told me that they would put it back together. I got it back and it worked like It had when I had taken it in. I put it on a job for the first time the other day and it went 35 feet and stopped driving. Chain is fine but it stopped driving. I called and asked what they were going to do about it and the service manager said his boss wasn't there and that he would get back to me. I haven't heard from them since. These guys know very well who I am because I rent a lot of stuff and spend plenty of money with them. I think they were in the wrong and they don't want to admit it. Be careful purchasing their stuff. Rent from them and they will treat you well but use caution when you buy their stuff. read more