I use a Garmin 60Csx. Havent had a problem with it even in heavy cover or in my jeep. Really easy to use after a little playing with. Also very durable, it survived a fall from the roof of my Jeep at 40mph (I forgot I had put it up there). Went back to find it was only minorly scratched. The etrex are very good too for the money. I have a couple buddy's who have them and are glad they purchased them.