They seem to be the old-fashioned Look type pedal, Deltas - the ones before Look Keos. I had them on my bikes before I switched to mountain bike type SPDs (the M520s mentioned by vickster). The Deltas are great once you are clipped in, but I did have a couple of near-misses with them when my second foot slipped off the pedal. The last straw for me was an emergency dismount on a 25% climb and then the cleat slipped on the steep road surface.
If you never go near steep hills, then I'd say stick with them. If you ever find yourself having to get off and walk, DON'T! The problem with switching to SPDs would then be the fact that those shoes are not really suited to them. You'd want the type with recesses for the cleats, as also mentioned above.