I am upgrading from the series 0. I just started swimming, so I really want one that is waterproof. I REALLY do not want to pay the extra $10 a month. I ended up buying the series 3 WITH LTE with the new nylon loop band. I originally was planning to buy the Nike w/o-LTE with the new nylon loop band but none of the non-LTE come with the new nylon loop. So I was going to buy the new nylon loop band separately. Then my friend said if I am going to be buying the band separately, it is only $20 more to buy the LTE one with the band I really want. I figure that I will activate the LTE and try it for 3 months for free and then decide if it is worth it or not.