I was out with my mate for dinner a week or so ago and he'd been removing a 'shield' type wrap from a 911. Nightmare to remove by the way.....
Anyway, he showed me some pictures of it being removed, it was yellowed, swirled, dull and generally not very nice to look at. From a distance it looked fine however when you saw the nice paint underneath it really made you wonder why you'd bother putting it on. I actually saw pics of the car finished too (post detailing) and it looked like a different car.
It's lovely to keep your paint fresh for the next owner however I'd rather enjoy it myself if I'm honest.