I've been using a Series 7 for a couple years now. I've been very happy with it. It uploads rides directly to Strava. The biggest plus is I don't have to carry my phone! I think it was within a month of buying it that I received an emergency call on it from my mother-in-law while I was out on a ride. I don't know what additional features the new ones have but mine gives me plenty of health related data. The most significant to me was that I used to worry about not getting enough sleep or good sleep. My watch seems to indicate otherwise. I choose to believe my watch which has eliminated my anxiety regarding sleep - an unexpected benefit. I did zero comparative shopping. It was part of package cell phone deal that allowed me to ditch my hated cable company. No regrets.