Summary: I really like this model. I had to replace my old one because the screen got sctratched so badly in my ATV bag, you couldn't read anything and the cost to fix my original was going to be more than I wanted to spend. This is a great middle of the road GPS unit.
Summary: I bought the Etrex used and in good condition. The unit worked as advertised, but the Garmin instructions leave a lot to be desired. Luckily there are forums on the web that can answer questions more coherently. I use the unit for tracking and setting waypoints. I did a trial run on a course that I can do blindfolded and the Etrex got the waypoints within five feet. All in all, for my type of use, I would rate the unit "good".
Summary: The Vista is an older model but has the additional bonus of an electronic compass that is usable without moving. It does have known issues, notably that the date sometimes doesn't function properly. There is a "secret" reset technique that works to reset the date, but supposedly this is not a permanent fix and the unit may need to be reset again. Overall though, it's a handy unit to use and is definitely user friendly.
Summary: I got this product for Geocaching. It's been very accurate and precise. The functions are easy to learn and use. The screen is very fine which makes for up close and personal looking. Batteries could last a little longer. Over all a great tool.