I have a '68 Volvo that needs paint and was inspired by this thread to consider wrapping instead. Just got off the phone with the regional Fellers rep who told me that the warranty information provided with the Avery (or any other brand) wrap is, in her actual words, "a bunch of bull." Apparently the 10 or 12 year warranties that some of the wraps carry only apply while the wrap is still on the roll. Once it's actually applied to the car there's no warranty at all on horizontal surfaces (e.g. hoods and roofs) and never more than two years on vertical surfaces (e.g doors). She said she'd just taken the wrap off her own car because after two years it was starting to look shabby and pulling up on the corners here and there. She'll have it done again because she sells the stuff but said it's in no way equal to paint as a long-term solution.
I was astonished by her candor - she couldn't have done a better job of talking me out of wrapping my car if she'd tried. I hope those who have already undertaken this project have better results than she describes.