Be carefull when purchasing any epuipment here if you are not experienced. I had good service when I went inside the store and the young Middle Eastern guy was helpfull(though he did not install my S/M card correctly). After running into a few problems and calling for some help, the service personel that answered was very short and would not assist me that day! I had an emergency case that needed the GPS unit I paid $ 500 for and the guy would never call me back.