Summary: The GPS has more features than I expected even after reading the product specs and description I use it for hunting and fishing and some work related operations. The instructions for overlaying graphics on the unit were somewhat vague. Using MYTOPO.COM and GOOGLE EARTH I have been able to install many maps that are very helpful. I was hoping for more accurate satellite readings but it does do as specified.
Summary: I bought this specifically for backpacking and hunting in areas that are too thick with vegetation and lacking significant geographic features to be easily navigated with a map and compass. When you factor in the trips out/back for hunting in the dark, and difficult terrain in marshes and swamps, I didn't want to rely on a map & compass to navigate safely. The eTrex 20 fills the bill nicely.