I own one of them and it is a very good Joystick. I can compare it to the Thrustmaster Warthog and the Black Mamba is the better Stick out of the Box IMO though the Grip isn't as nice and comfortable as the Warthogs. I pretty much prefer the Warthogs Handle and Buttonplacement. But the Mambas Gimbal system is much smoother and is made of quality Aluminium,where the Warthogs internals are mostly Plastic and prone to the well known sticktion issues which needs to be fixed by yourself. One thing I like with the Warthog more is the centering system,it feels more natural than the Mamba.The Mamba has a similar centering feel like the CH Sticks use,but that's up to personal preference.
Luckily there are add-ons planned where you can connect the Warthogs and other brand,like CH or
Saitek, Handles to the Mambas base,if someone prefers that. Also an Extension to the Stick is planned,which would make the Mamba an even better stick ,even compared to my Warthog with a 10cm extension.