I owned three (3) Rand McNally Model 720's, in six (6) month's time. While the R/M 720 has some features I'd like to see on the Cobra 7750, I'd still take the 7750, hands down! Rand McNally has poor service, or no service, on their products. Cobra has been in the radio business many more years, than Rand McNally. I bought the 7750 almost two (2) years ago, and I've had no problems with it yet.