Another loyal BFD 2 user here. It's definitely the most realistic drum program of the bunch in my opinion. It does have pros and cons though.
Pros: Very realistic. You can kill all rooms and overheads and you are left with a drum that still sounds like a real drum. The others in my opinion, do not have this sound. They rely so much on rooms, effects and OH's that when you kill that stuff, you're left with a drum machine sounding drum from the late 80's.
Sample pool is unmatched. There are so many hits per velocity in BFD 2, you will NEVER experience robotic drum lines...even if you have all the velocities set to 127, it still does a really nice job. Though of course you wouldn't want to do that...but it's nice to know it handles them fairly well.
Complete control.....it's the only drum module I know of that literally allows you to control the volume on every instrument individually. Not just with overheads. Finally...one with a ride cymbal control as well as crashes. Ok, that might be a little unrealistic when really mic'ing a kit as most of us will not mic crashes and have individual control over them. But I have always mic'd my ride.
One of the few drum modules that just auto-maps to Sonar's piano roll. Whatever key map you use in BFD is what you see in piano roll. This is an awesome feature.
Locked right in with my TD-10 and TD-20 module. The only things that needed to be adjusted to taste were my hats and chokes.
The cymbals are the best on the market and the stock sounds you get with it are plentiful and fantastic.
Cons: (though these in my opinion, are not cons in my world....I believe they would/could be for others.) It's not easy to use at first and is a bit intimidating if you've used other, more simplistic drum modules.
It reminded me of a DAW of drums and there was a bit of a learning curve needed to really unlock the power of it.
You have to work it just like a real kit. The sounds will NOT come out sounding processed like EZDrummer or some of the Superior stuff. It does not sound like Steven Slate Drums. If you're looking for "out of the box drums" with no work involved, this will not be for you. This is the closest thing you will buy next to mic'ing up a real kit. I promise you. Because it is so real, you need to work it as though it were real. Compression and processing on every drum....use of room, OH and ambient room are keys. You will need to do everything you would do to a real kit. Tuning, head muffling to control ring, panning, the whole 9 yards.
-Danny