I always derided the watch as an extravagant extra but I bought the series 4 the moment I saw it because I knew it'd be useful. I have also gone cellular and, since I've had it, my iPhone 8 has never left the house and I do all with the Watch. OK, I don't have all that many messages or phone calls but it works perfectly when I do and can dictate SMS replies either in French or English easily. I also love listening to music (that I've saved onto the watch) when I'm gardening as there's no iPhone to worry about when I'm walking round. I use Runtastic on the Watch when I'm cycling too and it copies my GPS route over to the iPhone when I get home. I just wish I didn't need the iPhone at all as the Watch has, to all intents and purposes, almost completely replaced it.