I went from a 12 pro to a 15 pro. Besides being disappointed that the battery life doesn’t seem any better, I’m content. I haven’t had any over heating issues or issues of any sort.

I just created a shortcut today to use it to turn on and off low power mode. I find it useful to switch to when I know I am going to be without a charger for a long period of time.

There’s no web browser on the watch.

If you have cellular you’ll still have internet access. Even with a wifi only model you can still connect to wifi that you’ve already used in the past and get internet.

I’ve grown to really like it. I used to have to use multiple watch faces to cover all the app/complications I used throughout the day, now I can easily scroll down and there they all are in the same place.

I’d just go for the newest so you are good for another 5 years+.