Have you ever used one? What were the fees and the experience like, and would you use one again? Is there one nearby where you live?
They're only good for being used as a billboard for Bitcoin.
I'd never use one to buy or sell bitcoin, the fees are incredibly high...it's insulting to us! Bitcoin is meant to be an alternative to a fee heaving currency system. Any mechanism that drives up fees for a transaction is bad for Bitcoin.
So are you saying Bitcoin itself is bad for Bitcoin? Bitcoin is designed to have fees and so the "mechanism" that drives up fees for a transaction is already in the Bitcoin algorithm.