Originally Posted by Chuck M

The lower cost of that strap is attractive as this isn't something I would use every ride. The toy I can't bring myself to spend money on though is a power meter. I've become interested in increasing my VO2 Max while running but Garmin requires a power meter to give this information for cycling. There is a Velocomp PowerPod which isn't near as expensive as but I don't know how it is supposed to work not measuring pedal force like a pedal or crank sensor would.