Currently the only firmware it runs is Betaflight. Which is fine for acro/freestyle but not usable for long range. Betaflight doesn't even have a functional return-to-home. Inavflight or Arducopter would be much better, but so far neither firmware supports goku f745hex. I have high hopes that they'll add support for inavflight soon as there is support for the quad version of this FC.
If you just want to do acro stuff, hex gives you better flight characteristics than quad for an over 250g build. No need to waste weight on a GPS reciever with betaflight, though.
Until a more suitable firmware is released, this build is very limited and I can't reasonably give it 5 stars.