Golf GPS systems

I recently purchased a Callaway U Pro GPS system.  I decided the time was right after (in heavy winds I may add) missing a fairway with a 3 wood by a fair old distance and landing on an adjacent fairway.  I under-clubbed hit a bunker and before i knew it i had 2 putted for double bogey.  As fate had it I was out messing about on the course one night and decided to drop a ball in the spot where i under-clubbed from.  I came down 2 clubs (6 iron as oppossed to an 8) and smacked the ball in the middle of the green and sank the putt for a birdie 3.  If only I had the gps before...