I have Black Shark
1) It's freakin' hard. I mean really hard. It's not like AH2 where you can just jump in and play. It has to be compared to something like Falcon 4, and you better read that manual.
2) The graphics actually are very pretty, if you have a machine manly enough to run it at full settings. If you do, it's a joy.
3) Don't bother without TrackIR if you like a good view system. The view system is not AH2 smooth.
4) Multiplayer... pretty lacking. That's what happens when you're catering to a tiny fan base. It's there, but you have to know where to look to find people that are worth playing with.
I'm mixed on it. It's good, but not good enough for me to invest the time to get everything out of it that it has to offer.