I had one before but wasn’t a fan of having to charge it every night - I know that hasn’t changed. I also had a fitbit charge 2.
I now want something I can swim with. I think the charge 3 will be fine for what I want it for. Also 7 day charge period which is a big thumbs up for me.
Not sure whether I should think about the I watch again. If you have got a 4th gen watch what do you love about it.