Don't know if I really count since I owned a 700 before the 500. And maybe that was part of the problem...though problem is too strong a word...
Had to sell the 700. Went without for like a year and came across a 500 at MLS powersports in KY (great people).
I'd always liked the concept of a 50" machine, and not having the same opportunities to ride like I did when I bought the 700, I got it.
What I found was that while I like the concept of a 50" machine, I DIDN'T like the execution. It rode horribly, and was sketchy on stuff I wouldn't have even though about in the 700. It was also harder to service. And I've b****ed about the rack thing be the worst of both worlds before.
Not long after, I moved back out west. Oddly enough, the trails out here tend to be not as rutted and worn down from traffic, so I actually enjoyed it a bit more out here...but it was really the same story. Bigger tires and wheel spacers to widen the track helped a lot, but even then it only went from horrible to bad. As soon as I got the opportunity to move back to a bigger machine, I did.
I'm going to say my machine had like 4,000 miles on it. Other than using a little bit of oil I never really had any problem with it, and I enjoyed it. But I wouldn't buy one again unless I lived next to or rode a lot of 50 inch trails.