Summary: Its a good idea, however there are few things that was concern, on of witch you had to watch out if you are wearing long sleeves because if you are the clothing some changes the hold number or screen and you have always fuss with it.
Summary: I bought the S3 about 6 months ago and have had a chance to use it both on my home course and while on vacation in several different locations. While very convenient compared to carrying around a range finder or other hand-held device, I find the yardages inconsistent and unreliable. I really don't care if the yardages are off by 5 or 6 yards from 200+, but expect them to be close when I am using my wedges close to the greens.
Summary: It's a great idea and very handy...when it's on the right hole. Bought it, charged it, took it to the course, first hole...worked great...second hole, it wouldn't change over to the next hole. And, there is no way to manually input or change to another hole so it was stuck. Once they give it the ability to manually input which hole you're on, I'll buy another one. Had to return this one for a credit. Was very disappointed.
Summary: When you happen on the right button combination, the watch works for distance to the green. Bought this one for my wife so she would know distance to dogleg, sand trap, etc. Best we have gotten is distance to front, middle, and back of green. The (much) cheaper version does that. This may do more, but the instruction manual might as well be written in Arabic (it sucks).
Summary: I had a Garmin Approach S1 since it first came out and I had no problems with it at all. I purchased the Approach S3 because it promised so much, but it just did not deliver what was expected. The most frustrating problem was that quite often it simply did not seem to know where I was on the course, and would show a completely different hole to that which I was playing.
Excerpt: Garmin has communicated they have a new software update fixing the problem highlighted below by 2 users regarding inputting location information. As I returned my watch I cannot confirm this is fixed. Perhaps someone else can test and confirm.