I've never cared for spd's. I've used Looks and they were okay.
Currently for clipless I've got Speedplays on one bike, and Crank Brothers Eggbeaters on another. Everything else has either platforms or rat traps or toe clips w/ straps.
Find what you like and use what works best for you.
I should add that I do have a set of SPD pedals, bit need shoes and cleats before I put the spd's on a bike.
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