Some of the new models are interesting but I'll swear by my ancient Garmin. I bought one of the first, I can't even remember how many years ago... 12, 13 yrs? Mine is a Garmin GPS 90 aviation model that I bought for my plane, so it gives me exactly what I need to know when hunting. (C'mon... every hunter needs to know whose airspace they're approaching and a 'Go To Nearest Airport' panic button, don't they?)
I still like a topo map and compass, but the ability to find my way back to anywhere after a quick waypoint entry is a real leg saver, especially when you can't see any landmarks for all the trees. I suppose the new map data and high res models have their place, but I don't hunt with the GPS on. I turn it on to enter waypoints I need, or think I might need, and that's about it. I've never switched the datum from lat/long and think other nav options and features would be wasted on me. All I really want from it is a bearing back to the truck, camp, atv, horse, whatever. But don't think I didn't zoom out to see where the closest airport was 4 days ago. We got two elk down in a canyon and I nearly had a thought about calling a helicopter to long line them out. (Hmmm, there's a potential advantage for an aviation model, after all! "From your airport, fly a heading of 287 for 22 nm to this lat/long. I'll be the one waving an orange safety vest.")
For me, GPS is a wonderful back-up when doubt arises. I'm guessing that most people would be plenty happy with simple models equipped with a basic 'Get Home' (or back to waypoint) function, and a simple, intuitive interface. Then again, I'm not one to RTFM when I can avoid it. I'm more the TIOALOTF (Turn It On And Learn On The Fly) kind.
And, hey! Dangerous game hunters: Garmin makes an automotive model with a back up camera that puts the rear view on your nav screen. Just hang the lens on your back pack and ol Griz won't sneak up on ya.
(Put Garmin (NasdaqGS: GRMN) on your watch list. Good product. Good company. First pick for GPS now and going forward. I'm going to buy the stock back when the tide turns.)