Have both the Gear 1 and the S. The S is a very large upgrade, definitely worth purchasing. As used with its own SIM card, it expands the functions of the watch were you can leave your phone at home and still have a fully functioning device. It is not too large, unless you are a tiny person with very small wrists. I get tons of compliments on its looks and screen quality and get tons of recognition when people realize that I am talking to them over my watch, answering their emails and messages on the watch, using both the keypad or voice. Great device, heads and shoulders above anything else on the market at this time and even over the Apple watch that has not even made it to the markets.