I believe Mentour had a review before the release (he is sponsored by Bose). I got mine about 10 days ago and used it the last duty block and i have to say i do like it. On the highest ANR setting you still hear the engines, especially in the short bus (A319) during take off, but its not really a bother at all. Only problem i have right now that COM 2 turned as low as is possible can be still too loud to hear COM 1 properly so i have to switch it off most of the time. Which is not ideal.
Still testing it a bit more, and i will have to test it alternating with my A20 to decide which one i gonna keep in the end.