I own MIXOSARUS drums... I also own BFD1, which of course isn't BFD 2, but...
Mixosarus are by far the most realistic samples I have used, and heard, especially the cymbals, and most especially, the hi-hats. And it's not just the samples, but the way the controller info is programmed to make use of these samples.
Your hats can actually groove, because the ability to program performances that mimic a real players stick movements are now finally achievable. Personally, this was never something that was easily accomplished before.
And imo, it's the cymbals, especially the hats, that are the "soul" or the human factor our ears recognize as "real" or "samples".
You can even do totally realistic crescendo cymbal rolls using the cymbal samples themselves, NOT a cymbal roll sample... that's a big deal when you think about it.
Perhaps the only "negative" is the fact that it is ONE drum kit. But the 3 sets of room mics allow such a huge range of perception, it's hard to complain. A few more snares would have been nice though...
And the compression used to record is not "obvious" compression. The drums sound unprocessed to me.