If I get serious about the Rampage, I will look harder at the warranty. Personally, I have never had a major problem with a product or it's warranty terms or policy, so it ain't that big of a deal for me.
In fact, I would be more worried about the dealer and how they treat warranty work than the actual terms of the warranty. I have had very good luck with my trucks, motorcycles/quads, and my boat on any and all warranty work. In fact my truck dealer usually gives me free stuff when I do warranty work with them.
Personally, I think the Rampage units are built very well and are the only camper I am aware of that has a UL listing, which I think is a bit of a comfort factor with their product. The guys at the shop said they see more of the other lines coming back in compared with the Rampage.
2007 Weekend Warrior FSC2800 Toyhauler, 2005 Silverado 2500 HD Duramax, 2005 Yamha Rhino, 2003 Kawasaki KFX400, 2002 Yamaha FZ1