As a laugh ever now and then, sure. Really slow a pressed out spins, done right they can be very good looking. But when you at a contest and you see 5 people in a row seriously spinning 9's or 10's across a flat-box I can't help but think it looks really silly.
So I guess I'm in the nay vote.
p.s. anyone who oles on a rail should have that arm cut off....... haha