I promised to report back, so here we go.

It’s not instant so you cannot use “Walk into room activations” — Apple Watches are super finicky to get sensing properly

But overall I really like it. It helps me and the wife know where each other are in the house (my office is in basement hers is on second floor), I have some automations that I have hooked up to location. Example, my dog needs a pill at 9am and 9pm every day, so if someone goes into the kitchen at 8:45-8:59 it sends a reminder to handle the pill then. If that hasn’t been sent at 9pm then it reminds both of us.

Definitely neat, but entirely skippable for most people. It’s not going to be very effective for much other than “oh she’s in the bathroom I won’t disturb her”