I guess I have the oldest Skyline posted so far in this thread, a 1993. I bought it last fall & it's in fantastic shape, you'd never know it was 19 years old. Everything works as it should, even the slide out works flawlessly. If mine is any indication, you guys with new(er) ones should expect a long service life from your units.
We're camping this weekend here in NJ, it's been so warm, so might as well.