GPS are easy to use and a great tool. As far as will they get you on your stand in total darkness...probably not to the tree but close and once your in the area you find it on autopilot(your own GPS-upstairs). The accuracy depends on where you are, satellite pos., canopy of trees, etc. I have had my Garmin say accuracy within 9 feet and yet other times within 30 feet. The bottonline is it will get you in and more importantly out. Would i use one to try and goto the same spot on GPS alone...never. But I can't really see how anybody would, unless they pass it around the campfire at night and try the old chinese firefighter drill.....NOW GO!LOL

I would recommend you get one with a digital compass. Mine is etrex(yellow) and you have to move a few steps to get the compass to orientate. As such i still carry a compass with me(not such a bad idea for backup), for wind dierction, etc while sitting.