Question, why are you buying a 3 series? From the first watch (series 0) the additional speed and screen might be “worth” it. Otherwise, after a day and a half with the new S3 LTE (and I have a series 0), I would say that no, it is not worth it. Unless you have a seriously specific need for stand alone connectivity or your old watch is starting to get old (battery losing storage), the series 0 does everything the 3 does if you have it tethered to your phone, which is my situation 90% of the time. I also do not need water proofing to 50 m, at all. If you are asking the question and almost always have you phone around, then I’d say the answer is pass on the series 3. Having said that, I have not decided if I am going to keep the S3. It works as advertised and I am really digging the SB SS. I just put it on the charger and it still has >75% charge (!). But other than that, for how I use my watch, I would not push others on the S3 model, the S1 model would suit most all without the $10/mos charge on top of the hardware purchase.