Anyone hear the Class D Audio Mini GaN 5 amp yet?

Wow, what a bunch of crap, all this "sounds better" subjective bs. There is no arguing subjective valuations of quality-it's all personal opinion, and there is no right or wrong, no better or best. If you want to debate amps or anything else on their merits, the only metric that means anything concrete is objective performance. Bruno has told me he has looked at GaN devices and hasn't found any reason to use them. His purifi amps already perform as close to a wire with gain as one can find. The fact that people are implementing tube buffers, etc., speaks to the fact that everyone has their own personal preferences. What's the best flavor of ice cream? Who is the most beautiful woman? All that matters is what YOU like, and all this wasted time and debate trying to find some consensus is a lot of noise about nothing. The only way to know if you will like something is to try it for yourself- the opinions of others are meaningless.

@soix 
I have the Audion now for two weeks,
They are driving DC10/Viking Berlin’s (MK II).
Very impressed and will definitely keep them.
I had listened to them at Ocean Way Audio in LA and was simply stunned of what the combination of an ultra low noise floor (-130 dB), very low distortion and a SET like signature of harmonics (albeit at very low levels) can do. These amps are a discrete innovation. Specifically, never have I heard mass strings and large choirs so resolved, detailed and natural.
Also the detail and texture at very low volume are simply stunning.
Definitely try them out!

Is it a coincidence that when you put transistors in a glass tube that looks like a electron tube that suddenly the sound is called SET like? As opposed to your typical Spartan Class D amp box that no SET fan in their right mind would ever own, eh?

I wouldn’t put it that way. I understand the specific design objective was to create a GaN amp which delivers SET-like harmonics (without paying the price of high noise floor and limited dynamics). In my view this has been completely achieved.
The design of the “chip in a tube” amp board may be a matter of taste. But the workmanship and appearance of the unit are quite beautiful.