At this point I've had:
SG3 from SkyCaddie
GolfLogix on iPhone
gx3i from leupold
My honest opinion is the following... buy a skycaddie.
here's why. the iPhone is horrible in the sun, and the battery life is generally some what of an issue. The accuracy is questionable as well. other then that, it's pretty cool to use an app. if i'm left between nothing and this, I'd use it no doubt.
the skycaddie was always pretty accurate. I knew distances to everything relevant on the course, something lasers will never be able to do. And the newer models out now are ridiculously good from what I see. You can't possibley have more useful information, and use anything like a laser to get this info. Sure, there's a 2 yard variation from reality... anyone here have a 2 yard variation in their swings? It's a joke... plenty accurate, very fast and easy to use, and lots of great info for course management. Yes, it requires a yearly membership, but, it's also better mapped then some 20 year old kid in India doing etch and sketches on old google maps like the preloaded ones use (and no, that's not an exaggeration as to how that happens).
lasers... well, I have the best out there and here's the scoop. Not always easy to get the distance to the pin. Sometimes you miss the pin, and almost any yardage to a bunker or something is not accurate because you have no solid edge to shoot. Basically, it's a very accurate way to get distance to the flag. Great... but there's a heck of lot more to course strategy then that. For practice they are awesome, and this is where they really shine in my opinion. On the course, unless you are in the middle of the fairway / have clear line of site and playing a flat course, good luck, and you'll only know one thing... how far is the pin. Where that is in relation to bunkers, the depth of the green, where there are ridges/slopes on that green... nope. Fairway bunkers, doglegs, layups to water, etc... eh, not really.
In a perfect world, you'd own both a laser and gps and leave the phone in the car. But budgets being what they are, if you need to save money, use the app and realize it's just not as accurate. If you have $200-400 to spend, then the handicap legal devices in gps and laser come into play, and in my opinion, go with gps or buy both.
Edited by golfpros1, 12 April 2012 - 01:07 AM.