Jerry From LA wrote:
Learn to use it with the raw UTM data, a topo map and a UTM square. It will take you maybe ten minutes. The military uses GPS this way.
Agreed. I'm a former Boy Scout, I was on the ROTC orienteering team in college, and I'm a retired Army Officer. I understand UTM, MGRS, latitude and longitude, etc, and I'm a fair navigator and/or forward observer for someone who never had those job descriptions. I learned with map and compass, paper and pencil and the old GI grid overlay, even played with an E6B on the side for the math, but I love what a GPS can do.
If it were purely for geocaching, the etrex is OK. I've tried geocaches that were well enough hidden that the accuracy of the etrex left a lot to be desired. WAAS and maps make it much more useful for that and other things.
It took a little practice to learn how to use the buttons on that particular unit, how to navigate its menus, etc. True of any unit. The best practice I've found is geocaching.
OTOH, my etrex was a gift, and I've enjoyed it immensely. I've found all but one of the caches I've tried for.