Clearly I'm the spouse. ;) I've had mine since Christmas and I still really like it. Random thoughts after reading your thoughts:

Battery life comes in consistently at about 6 days for me. I don't like that it doesn't give you an easier way to check that, but eventually it will show a low battery symbol on the home screen. If it shows that at 8:05am right after I get to work, it will die by 5:25pm, 10 minutes before I get home. A decent amount of warning depending on how many notifications you get. YMMV

I really need to deactivate the music controls. I accidentally triggered my music during church. Fortunately it was only Elton John that started playing.

Water resistancy is great. I've showered, swum, done dishes, and bathed the baby in it. No issues.

If I leave my phone in my office while I"m on the reference desk, the bluetooth is almost in range. So it will continually connect and disconnect which causes lots of vibrating and notifying and probably drains my battery.

When I'm walking through Fred Meyer or Costco and pushing the cart, it doesn't count my steps. My old fitbit used to give me almost 2 miles of credit if I did both of those in a row. It makes me irrationally angry not to get that credit. So I do this thing where I try to push the cart one handed. Also I should probably work out more efficient routes through the stores.

I love the firework goal achieved and I'm enjoying letting it set goals for me, pushing me more each day. And then I fail many days in a row and it back pedals on the goals. It's fun. I like to imagine its tiny robot brain saying, FINE, you won't walk 7,000 steps, can you please just leave your office today?

Also my baby has learned to hit the band until it wakes up which amuses me.