Although long-time cyclists, we're new to tandeming. We chose these http://www.nashbar.com/bikes/Product...35_-1___202531 for several reasons

- two-sided, cleats and a "flat pedal" side when we want to hop onto the bike for a beach/beer run
- takes a SPD cleat, recessed into the sole of mountain bike style shoe for walk around comfort
- price!

I ride my single 8,000 to 10,000 miles per year with SPD SL's and find that the SPD's are less than "engaging".