Seems to be a lot of instability in the binaries for the F3, and F4 (401 in my case), however as always the native STM32 Espruino board runs great by comparison. Unless some else has a good experience, I would advise not to wasting you time on foreign builds.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Just a quick update ...
Seems to be a lot of instability in the binaries for the F3, and F4 (401 in my case), however as always the native STM32 Espruino board runs great by comparison. Unless some else has a good experience, I would advise not to wasting you time on foreign builds.