don't pay any attention to the haters and stylists. If you ride often, or go on trips where you spend days riding at a time (meaning that your board gets thrown in a convenient corner instead of stored in a bag), then its totally worth it. Just keep in mind that it might interfere with some butter-lip maneuvers if you're into that sort of thing.
It will also help protect the board from getting dinged while waiting in line for the lift.
The reason I don't use them (maybe its just me) isn't because they aren't stylish. Considering the amount of abuse I put my boards through in a season, tip and tail dings are the least of my concerns so protecting against them are low priority. I'll put any gay looking protector on my board if it'll guard against core shots or delam or edge damage.