I just ordered a COMPASS a few days ago, before introduction of the FUN. I have to say if I had known the FUN was coming, I might have waited and ordered it instead of the COMPASS. That ACSS "current mode" module sounds quite fascinating to me, I might have liked to check that out. Similar to Krell's CAST maybe? Dunno.
Anyway this looks like a fascinating product, a real HOBBYIST product. I really like "playing" with audio gear, adjusting and tweaking and modding, to see if I can change the sound to something I like better. This highly configurable FUN looks like, well, like fun!
The FUN represents A VERY INTERESTING idea from Mr. Kingwa. I suspect Mr. Kingwa must be a bit of a genius to perceive that there would be market interest in a product like this, and then to be able to design a product in a modular way that allows meaningful but subtle changes to be made by swapping out the various sections. BRILLIANT!
I also want to compliment Audio-gd's great customer service. When I bought my COMPASS, I found the ordering / confirmation process to be very professional, fast and reassuring.