I just got a 7200, and it works very well - great picture, good GPS data. The problem is playback on the Lukas viewer - the video freezes every few seconds. (might this be related to GPS frequency?) I tried the 7200 viewer, as well as the one for the 7900; both do the same thing. If I watch the video file on another program, it plays fine, no hesitation or freezing. Any ideas?