I've been clipless now for a couple weeks. Before that I used toe-cages for about 10 years.
I use my bike mostly for commuting. Lots of stops and starts and putting the foot down.
My Speedplay Frogs www.speedplay.com/index.cfm?fuseaction=home.frog seem to be a whole lot easier to get in and out of than my toe-cages. Even if I have to take off (like at a traffic light) and don't get clipped in right away, the platform of the Frogs is big enough that I can pedal through the intersection safely.
I have mtn bike shoes (Specialized Taho) and have no trouble walking around in them. The cleats make a cool crunching noise when the 3 little metal bits hit sand or dirt on the cement. No problem with traction.
Did a lot of research on clipless, both here and talking to riders I work with and biking friends. Frogs seemed like the best fit for the way I ride, and the kind of simple clip system I wanted. I've been surprised by how much I like them!
Like a lot of folks who've gone clipless have said, "I wonder why I held off for so long!"
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson