I have a S3 Apple Watch, and while it’s stuck on an older version of watchOS, it serves my purposes perfectly. Sends me notifications, lets me control my music and tracks my exercise. That’s pretty much all I need from a smart watch at this point. The battery isn’t amazing, but if I charge in the evening when I’m watching TV, it’ll last me through the night. I give it a little bump while I’m drinking coffee and reading in the morning and it’ll still be on 40/50% when I get home from work.