Hi,
I've tried a few of his wooden flutes. I had an early model that was not there yet, but his flutes are now easy blowers and they get better and better. As always with Barna, the intonation is great. I got an Eflat from him, a nice little flute with some humph and a very nice tone! I went for Mopane which unfortunately cracked a few weeks ago, but the flute is still responding very well and Barna is happy to fix this as soon as I can send the flute.
I play the Eb here:
https://www.youtube.com/watch?v=7e8ykYhl7LsSo I wouldn't hesitate much. I can't vouch for the keys, I haven't tried them, but if he's putting as much effort into the keys as into the flute itself, you shouldn't be disappointed.
Michel