Do not buy this for offroad use. It will not track where you have been and if you go offroad it gets confused. This is a great unit for on road use.
beat me too it.
I have one of those (nuvi 200) in my tow rig, and a garmin Etrex Vista Cx in my 4runner. The only thing I dont like about the Vista is that it calculates altitude based on the barometric pressure rather than off the satilites. When I mount it on my motorcycle behind the windscreen, as I accelerate it tells me I just climbed 60 feet on level ground
I also have one of the older Garmin Etrex legend's (the blue ones) It works just as good as the Vista, has about twice the battery life and is fairly accurate. only thing the Vista does better is it has some basic routing fuctions built in (only has major highways and interstates) but you can buy the mapsource software for it to be able to do door to door routing but for the price of the software I just bought a new GPS with the maps built in and called it good.