Received my PT2 last Friday and today (Monday) it fell apart.
Opened a support request. We'll see what comes of it.
And just to clarify, it still works fine. It's just the sticky tape that holds the screen that gave out. Glad I didn't take it into the shower.
On the plus side, I guess the battery is user-replaceable now.

Update: A representative replied to my email, asked for a photo of the serial number and then asked me to file a bug report.
In order to do that I had to create an account, which regrettably can only be done by linking an Apple, Google or GitHub account.
So now I'm waiting for a response on the bug report.

Update 2: Replacement watch is on the way.

Last update:
Replacement has arrived.