I have an older Garmin ETrex that I'm not at all impressed with. It loses it's fix in pine forests, or if you are holding it so that it's sideways, it loses it's fix. There's no good way to hold it while you're hiking.

If the newer ones have better sensitivity, that's good. I would not buy another unless it had a better receiver. And I would still bring along a map and compass, and the skills to use them.