I just got the eXplorist GC for Christmas. It came with the 1.6 firmware as well. It started working great at the begaining, then as I added pocket queries It started to get GPS signal degradation, speed, and lock ups. As of today, it will not boot up to the main menu. I even tried the boot to the white screen with no success. I just downloaded vantage point, but have no experience with it as of yet. It looks to be a good GPS, but I have found that these issues seldom go away. I plan to return it and give it another shot with another one before I call it a lemon.