I've seen guys do it in person, and even though I'm pretty good with applying large decals & chip protectors, I wouldn't want to try a wrap.
They look pretty good, but like Al says, doesn't look as good as a cut & buffed paint job.
I think the going price - depending of course on size, complexity, and difficulty - is around $2500 in my area.
As I recall, it's very thin: so any dirt in the paint, ridges from stripes, etc will show through the wrap.