I have Keen SPD sandals (from REI) and Shimano SPD shoes (MT-40 from LBS) paired with Shimano A-530 pedals (from REI - platform on one side, clips on other). I use the sandals in warmer weather and the MTB shoes in cooler weather (under ~50F/10C). Both have worked well for me with the dual-sided pedals on longer day rides and weeklong tours.