I've had the 2.5 for nearly a year now. Now I'm spoiled and will never play without it. Technically, this is a great unit. It is very accurate giving front, middle & back of the green from any direction. It is particularly helpful in giving carry and layup distances and where the end of the fairway is on dog holes. It is simple to use and allows me to make a quick club selection. It truly does speed up play...and comes in very handy on those pesky par 3's. It's about the size of a cell phone and does not get in the way when clipped to your belt. Be aware that sometimes when getting into a cart, it may pop off the belt holder. Due to its size, the screen is fairly small...though I can still read it without my reading glasses. Substantially less expensive than its larger cousins, but with nearly all the same features. There are annual dues to pay, but amortized over the rounds you play in a year make it worthwhile. Since the unit will hold only 10 courses at a time, be sure the course you're heading to is on it! The only real annoyance is when every guy in the fousome constantly asks how far out they are! ... really not that bad at all!

Excellent GPS System- I have an added confidence to my game now by knowing I always have the correct club. No more guessing distances when in the rough or inside of 100 yards. I used the shot distance feature to find out how far I truly hit each club. This info has helped my game by adding confidence to each stroke and giving me a plan on each hole by knowing distances to hazards and lay-up zones.