[oliwary]

I have it! Pretty fun to play with, although I am not experienced in C++ so have not been able to make it do super useful things yet. It is also quite fiddly - I think it would take quite a lot of work for it to be useful as a daily driver.

Here are some useful starting points if you want to play with it:

Instructions for setting up a platform that easily allows you to build your own simple apps for it: https://www.instructables.com/Lilygo-T-Watch-2020-Arduino-Fr...

Extended version of the platform with many included apps and features: https://github.com/wfdudley/T-watch-2020

MicroPython port for the watch (have not been able to try it yet and not sure if it is maintained): https://github.com/OPHoperHPO/lilygo-ttgo-twatch-2020-microp...