I have one of these, I picked it up in early november. I love this rifle as well. I was out north west of edmonton shooting with a friend. The cops did come, they did think it was a machine gun. After inspecting the trigger group, magazine, registration etc, they let me go.
I was close to red deer yesterday shooting with it. My friend has an AR-180B and we were shooting clay pigeons we had set up at distances of 50-150 yards. Once sighted in properly, I had no problems consistently hitting the clays out to 150 yards. I owned an SKS-D and I would say the CZ-858 is a much better rifle, and for 650$ its a much better package. I picked up a muzzle brake from dlask, but I found it works too good. The barrel does not rise, but it drives the rifle into my cheek bone, very hard too, I removed it.
All in all, I love this gun. With the cheap 7.62x39 laying around, it is affordable to shoot too.