I'm Tom (thomasbeau) from Moosup CT. I have had a TT510 for about three months and love it. Very few problems and it works flawlessly with my Powerbook. It has gotten me where I've wanted to go everytime and even showed me better ways to get to places I thought I knew the best route. The best thing of all is that my wife, who seldom ventures out any real distances alone is now completely comfortable going just about anywhere by herself. If she make an wrong turn or encounters a detour, the TT always gets her there and back home again. She has had a great time christmas shopping this year. My TT510 kicks A$$.