Golf is a very complicated sport, and every single person who has ever played it understands this. Unlike any other game in the world, having a device to display precise information is sometimes essential for the success of golf. So, yes, golf watches are worth it, and TomTom has a couple of impressive ones on the market. They can be used as a tool and improve your golf game. For example, if you do not know the yardage of each club, a GPS golf watch can inform you of how far you hit each shot.
Of course, they come in handy in the instances where you find yourself outside of the fairway (or in another one altogether). While most golf courses will have yardage markers for 100, 150, and 200 yards, you typically are left in the blind when in the heavy rough. With a GPS golf watch, the guessing game is eliminated, and you will know the exact distance to the hole on every shot.