When I retired from the USAF, I wanted to do something different than working on aircraft, so I worked on motorhomes for almost 10 years. During that time, I saw some for warranty work. But, we sold more Fleetwood motorhomes than all the rest combined, so all in all, everybody was pleased with their purchase.
I have owned a 40' Fleetwood toyhauler, and I was pleased until the day I sold it. I just bought a 33R Fleetwood Flair. I know I'm not directly answering about a Discovery, but Fleetwood in general, and I'm pleased with what I've worked on, and what I've personally owned.
As long as the drive train is in good shape, you'll have thousands of miles of pleasure and memories with your coach. Go make some memories now!!!