The m505s came stock on my '03 Rockhopper Comp. I am not too thrilled with them. As another poster mentioned, they become packed with mud easily and are quite difficult to clip into at these times. The main thing I like about them is the adjustable tension, which is a nice feature for a beginner, IMO. Also, re the platform, the pedals can be changed to clipless on both sides simply by using an allen wrench to loosen the pedal tension and then popping out the plastic sled (that constitutes the platform), using a flat-head screwdriver. And yes, they can be used with any SPD compatible shoe. Just my $0.02, but if you buy the bike, just use the stock pedals and get used to riding clipless. Then, if you like, upgrade. Take care.