I've had my Sky Caddie since late July 2009. I use it every time I play. On a course that is mapped, it is GREAT with giving accurate distance to & over hazards etc.
I recently played a course with GPS in the cart. The Sky Caddie had virtually the exact numbers at every location throughout the round.
On a course that has only the front/middle/back yardages it is still helpful in that you know accurately how far away you are.
I now find myself checking the front/middle/back numbers more than the actual distance to the pin. Getting onto the putting surface is just as important as knowing where the pin is located.
I agree with others who have posted......the annual fee is a bit pricey, but Sky Caddie is the best there is.
Pros: Features, Quality, Easy to Use, Good Value, Durability