I bought a Foretrix 301 by Garmin for work (later found out there's a 401 . . .) and it proved valuable in the field
when I got back I started wearing it while running and I'm surprised I ever did pt without one!
without getting into exhaustive detail on it's every feature, I will say it's great knowing exactly how far I've ran, my average speed, my max speed, and a tonne of other statistics
it's great for short runs, long runs, and even sprints - plus it wears easily on your wrist
