I used to have one. really well made, versatile little knife, but the Kerambit ring made it fit horrible in my hand, so I wound up using it without using the ring for a short while before I gave up and sold it.
If it happens to fit your hand though, it's a great little knife. (My hands are XX thick XX wide with little short tinkergnome fingers, so that's not the first time I've had difficulty with a knife fitting me)