I have a series 6 watch and it is very useful. I can check the time, the weather, and my parents timezone with a glance. It's nice to control my music without taking my phone out of my pocket, and I enjoy the fitness rings. I'm not a big sports/outdoory person so I can't speak to how useful it is in that regard. I will say though, I would probably wait until the series 9 comes out because it's expected to be the first time since the series 6 that they're significantly improving the efficiency of the chip.