i can skip and skid with no problem on looks. however, they are a pain to walk on and a bigger pain to get into. since they're one sided, you have to be very particular about how you clip in; if you mess up and happen to be on an incline, you'll end up pushing with your cleat against the underside of the pedal. this is only an issue when you're learning, but happens occasionally even after you've been riding for weeks.
you can skip the hell out of them without ever coming out, but they're a pain to deal with.