I'm still clipful because I have odd priorities; I'd rather buy a bicyle blender, and I'm mostly commuting and have a major clutter issue already. Everybody but one person that I know has loved them once they switched; they really are as easy to get out of as clips for most folks.
If you find yourself riding on club rides and things and just wanting to go that titch more efficiently, it's one of many things that can notch that titch up. On the other hand, I *love* passing people when I"m in sneakers :-)