Good but not perfect
This is my first gps unit, so this review is necessarily from a newbie perspective. The O 600 seems to work fine, in that it can tell you where you are, where you've been, and which direction you're going. And some other stuff. The printed manual is rather brief, covering only the basics, and the downloadable electronic manual doesn't cover everything. For example, I couldn't work out how to change the backlight illumination level, and the only way I could find the info was in a youtube video. That there are options that aren't explained is a bit frustrating. The 1:50K map is pretty clear, but I suspect 1:25K would be an advangtage for walkers.