Having spent 2 hours with the Magellan 315 on a camping weekend in Arizona's mountains, I can say that the unit is all that's advertised. The manual is cryptic, but once you get used to the customizing menus and 9 available navigation screens, the rest is pretty intuitive. I was able to create a waypoint, walk half a mile away in the woods and return to within 20 feet. It works surprisingly well even in a rather heavy forest. It was showing an estimated RMS positional error of only 6 feet at one point! Routes are given in 1. foot increments when you are within .1 miles of your waypoint (with the updated software you can download from the Magellan website)! As long as you keep moving, the compass feature is quite good. It even displays the sun and moon locations versus the compass dial.