I've used the SE for about 6 months and have been generally pleased with it's performance, with 2 exceptions. Recently when I was in the middle of nowhere on a high mountain in Nevada it wouldn't turn on. I knew it was charged. Since I knew my wife would freak if she didn't hear from me (I was hunting alone) I had to hike out and drive almost 2 hours to a place I had a regular cell signal. Delorme's technical service guy then told me how to do a reset, which instantly fixed the problem. Supposedly that little technique is now printed on the back of the newer units. That really cost me. Second problem, and this resulted in the need to have them send me a replacement unit, was that my right directional pad button went out on me almost completely, which is super frustrating since it takes long enough to compose a text on the darn thing anyway. Supposedly they just shipped my replacement. Assuming I get it, and don't have the same button problem again, I'll be satisfied with both the unit and customer service. It has always worked for me, even when I'm deep in some nasty canyon.