I'm treating the GPS like a toy... which it really is, it's a lot more useful for hiking than for riding. It doesn't have anything like a cyclecomputer's auto start/auto-stop function, so when you're sitting still and it's recalculating positions from new satellite locks, it thinks you're "moving" slowly and skews your averages to be inaccurate. i have found it handy to know exactly how tall a hill is - central white rock BC is 110M above the ocean.