Summary: I took advantage of a trade-in program sonocaddie offered and traded in my V300 for the V500. Once I received the V500 I found that while on the course it would either shut off by itself or go back to a previous screen. I called customer service and had to pay for shipping to send it back. Customer service was OK (other than I had to pay for shipping on an inferior product) Anyway, it was a battery issue and they replaced the unit. The new unit also had a glitch.