Please don't hate on me if you make it decision based on it. I liked it over the AK100 however it has few glitches that might annoy some. I personally like to see a revision of them with the same design philosophy. Also having got to try the other opamps on them muse01 is the one I felt is best sound, 627 was too mellow and lack treble detail and muses02 will honestly it was the same as 01 to me.
I never got to try the 12V edition, I assume that is better?
Also I finally figured out today what your avatar is, gentle giant cover.