My experience has not been good. In the first couple of days the heater quit, and since the dealer where I bought the trailer was over 300 miles away I called Keystone and they said I could have my local RV repair shop fix it, they found oil in the gas pipe that did not get removed after the pipe threading process. When I sent the bill to Keystone they said they would not reimburse me because the pipe could not have oil in the pipe because the heater uses propane gas. After several phone calls Keystone finally reimbursed me the $122.00.
The hot water board failed, and one of the fresh water tanks started to leak. Keystone said I could get warranty repair at any Keystone dealer, but I tried several dealers and they told me to take it back to where I bought it. I did finally did find someone 100 miles away to fix it, but it took a week until Keystone decided to send a new fresh water tank. the tank was installed, and the control board for the hot water tank. Thinking I was good to go I hauled my trailer home(100 miles) and parked my trailer. First thing in the morning I went out to unhook the truck from the trailer I found that the fresh water tank was leaking, so another 1oo miles back to the repair shop to drop the trailer off. The next day the repair shop called and said vent port was not welded in good and they offered to weld it which I agreed to so I could get my trailer done. The repair was completed, and back home. With 400 miles on my truck and trailer, and about 300 dollars in fuel we could go camping again. All good now right? Maybe not. When we would get in the shower and shut the water off at the shower head and soap up, and turn the valve back on the water was scalding hot. Given my experience of dealing with Keystone trying to get warranty I decided to fix it myself which I did by installing a check valve in the cold water line to the shower control valve.
Now in Feb.21 the second fresh water tank developed a leak, so again I decide to fix it while we were on a trip. I took the leaking tank out and found the drain port had not been welded well to the tank, so I took it to a repair shop in Arizona where they said they could weld it. It took them 5 days to get to it, and when I picked it up I told them It did not look good. They said they checked it and it was good so I put it in and it leaked, I called to tell them and they said just bring it back and they weld it again but I said forget it. I am currently working with a dealer to buy a new fresh water tank from Keystone,(not on warranty since I tried to have it welded). Also I found stress cracks on the gusset plates on the frame which I repaired myself. And finally, after trying to get warranty (like pulling teeth), I decided to try to get a refund on the extended warranty I purchased for $3000 dollars, I am still working on that.
So beware, when you buy a new trailer it may not be all that you hoped for. Hope you have better luck than I did, and if you can find a used trailer that someone else fixed all the problems, you might be better off.