I got an S-1 for Christmas this year and have played about 5 rounds with it. It seems to have every course in my area ranging from the local private country club to the local 9 hole executive course.
I've found the yardages to be very accurate based on tee box markers and sprinkler heads. Certainly accurate enough for my crappy game!
I think whether this is for you or not is largely based on your personal playing style. I found it to be very distracting to pull out my iPhone, punch in my passcode, launch an app and so on for every shot. For me, I'd rather have less data but just be able to glance at my wrist, grab the club and play. That's the huge benefit of the S-1. The basics are right there.
One poster said the band broke quickly; that seems like a one off defect. I have another Garmin watch with a similar band that I use for cycling and running and I've had it for years with no issues despite moving it from handlebars to wrist and back constantly.
One funny story. The first time out I was playing an exec course with my son. The 2nd hole is normally about 140 yards, straight out but they had moved the hole while the ground was on repair so that it angled off about 45 degrees to a green that is normally a practice green I think. I looked at my watch and it said 140. My son says, "no way, dad, that is way closer than that". Being a complete idiot, I say "dude, the GPS doesn't lie" and proceed to nail a perfect 8 iron over the green and all the way into the group teeing off on #3. Thankfully no one was hurt and I apologized my ass off. Obviously the pre-programmed course and GPS data didn't pick up the fact that they had moved the green to the right and in about 25 yards. My son still brings it up every time we hear one of those stories about someone driving into a lake while following their GPS in their car...
Seriously though I love the watch. Especially good if you are a high handicapper and occasionally end up in the wrong fairway or way in the rough and need to scramble your way back.