The only clipless I've used are Looks on a road bike. I hated them. I could get out of them fine, but there were so many times when I would try and set off, usually with a long line of cars behind me, miss the clip in and loose my footing. Not saying that they are wrong, just not for me. I must be the only person who had flats put on a high end road bike. But then again, after a while, I realised road bikes weren't for me - all that bent double, bunny hopping potholes. I'm much happier perambulating on my touring bike.