Used other Golf GPS systems before ONLY to find they really dont work as good as they're advertised. Was convinced to look at the Sonocaddie V300 purely for the accuracy of their hand-mapped courses. I haven't looked back. I should have purchased the Sonocaddie years ago and saved myself the headache. Highly recommend to any golfer looking for a great Golf GPS that WORKS !!!!!!!!!! (Posted on 12/05/11)