I've had my 510 since May and love it. I had read all the negative reviews which made me think twice but ended up getting one. Now I wonder why I didn't get it sooner. The Live Track allows my wife to monitor my progress which gives both of us some piece of mind because I travel back country roads and she can also check my progress when waiting on me at charity events. Also, I didn't realize that that there is a psuedo mapping that tracks your route on a blank screen which is almost as good as having real map for me (if I need a real map I just use my phone). Coupled with the Turn by Turn directions and I never need a map.