I was looking for a way that I could geotag my photographs while traveling, but dedicated GPS modules for cameras tend to be expensive (and typically have a ton of complaints), and GPS logging apps are a great way to kill a phone's battery. I decided to give the eTrex 10 a try, as it was cheap, advertised a long battery life, and can log to a GPX format which can then be matched to photos in Lightroom. The user interface on the eTrex 10 is not exactly intuitive and has a bit of a learning curve, but overall it worked extremely well as a GPX logger. The batteries lasted several days seeing about 6-8 hours of use per day, and it typically recorded thousands of points per day, which allowed for very accurate geotagging.