Bushnell was kind enough to send me there BackTrack GPS D-tour this last week to review.
16-20 hour battery life and no special batteries just uses 3 AA batteries.
Easy to use
Decent weather construction(Can handle splashes and dust)
Tells you the temperature and altitude.
Software application works on Mac OS or Windows OS, very easy to use and accurate.
Software application only relies on google maps. Not saying this is bad thing the maps are current, but what if your an area that does not have internet access.
Overall I was very impressed with the BackTrack D-Tour. Rating from 1 to 10, I give it 9.5
BackTrack website: http://backtrackgps.com