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Great very basic unit -- great for "get home" trails and general location, timing, speed etc. No map database but good "breadcrumb" display on unit. Has serial interface so waypoints can be uploaded, and data downloaded if you're so inclined. Best feature is that it runs on standard AAA batteries so you can just carry spares rather than fussing with charging. Battery life is very good, particularly with lithium cells. Can be mounted on bicycle for speed etc. Mine lives in my go-everywhere stuff... Con: The built in antenna (on the top edge of the case) has to "see the sky" pretty well to get a signal -- susceptible to being pointed downward or aside and losing signal momentarily.
from Hudson Valley, NY on 2/10/2008
A smart small GPS, easily mounted on forearm for quick reference. No map illustrations. BIG text makes easy reading while moving. I often use it while windsurfing for speed runs and marking distance, time etc while kayaking. Water has infiltrated and rusted out one battery electrode. Jury rigged a replacement and good to go. I now rinse it in fresh water, and blow dry.
Over all a simple unit for it's intended market, though they should lick that leak problem. On land, I often lose satellites in the trees or even in the wide open Grand Canyon.
from Tempe, AZ on 1/16/2008
It's a great concept: very portable, accessible, and handy, but the batteries were eaten up in just a few hours. It may have been a defective unit, it is being replaced by the manufacturer, so we shall see how it goes.