I like that it does a specific amount of functionality really well, rather than over reaching and then trying too much yet delivering poorly

The battery life is the single reason I expect to keep using it. Every order smart watch I've had had been okay but usually quite meh, and at some point I've grown tired of the endless inconvenience of charging... So I leave it off for a few days, that gets longer and then I realise I can't be bothered to keep using it. Whereas this one lasts 20 days at least, it's not hostile to me (no pinging endlessly), I get how it works (none of that crazy Google Store confusion about what is a phone app and what is a watch app!) and it has a great ecosystem around it.