I have a Magellan 4000xl, which is kind of old but still works fine.
Used to be my Dad's, he would use it to spot fishing holes on a lake.
I use it for a variety of things:
Logging my car / spike camp location
Setting waypoints for a route through new country
Marking specific landmarks / rendezvous points
Most of my hunting/camping/hiking is done in thick, high timber... it's pretty hard to get lost, but the GPS sure saves time and effort. Like when dark is 30 minutes away, and you're not REALLY sure how far you trailed that elk, or over how many ridges....
Buddy of mine and I play a game: pick a section out of a topo map, he starts at one end and I start at the other. The trick is to see how close we can come to a designated meeting point. With the GPS, is you get confused, it's easy to straighten yourself out. Best way to use it, in my opinion, is to get a bearing on a known point and turn it off, using your compass to guide you.