I've got a 2005 WW FS30 and have had NO MAJOR PROBLEMS with ours - however I've only towed it a total of 15 times since new in Jan of 2005. I've not heard of many cases myself - although I read alot of postings on the internet with few pictures to the stories.
The CHIEF complaint that I have with WW is the incorrect sitcker for the actual weight! which is one of the PRIMARY reasons we purchased a 30' FS30 - The weight shown is 5897 - and went to 7193 with the new sticker I was sent my WW - a difference of 1200 + pounds. Still concerned about what the true DRY weight is! with no cargo, no water or fuel.
Cheers - John
P.S. Of all the TH's out there! WW is one of the best that I've seen.