Has anyone used the TimeBeat PTP products?

I recently came across this video about the TimeBeat PTP product line:

TimeBeats is a hardware platform based on the rpi cm4/cm5 modules, which supports the TimeBeats daughter board implementing PtP disciplined by GPS as a ready-to-run PTP Grandmaster. Im thinking of building one, or possibly buying the reeady to run kit, and was wondering if anyone has experience with the product? it is fully open source, so you don’t have to use their hardware, I gather.