Arduino for STM32

I recently came across this open-source STM32F103-based development board called RedPill001here: https://www.pcbway.com/project/sharepro ... 662f3.html
It looks like a minimal but flexible board, based on the Blue Pill form factor but with several improvements in layout and component placement. I’m considering building a few of these myself for some lightweight embedded projects using STM32duino, and I’d like to ask:

1)Has anyone here tried the RedPill001 or a similar custom STM32F103 board?

2)Are there any gotchas I should be aware of when flashing STM32duino on this board (e.g., USB bootloader compatibility, clock setup)?

Thanks

It's H5 board, not F1.
You probably won't find a compiled USB bootloader for it, you will have to compile one yourself.
analogRead() is really slow on H5/H7 MCUs.