I've shot one. Got very disappointed.
Shooting it was strange, the recoil of a .22LR but the noise of a .223.
But when I wanted to chamber the first round, I fully racked the slide and let it go on its own and the thing stopped halfway forward, not enough energy to drive the parts fully forward. The gun have been fired a lot and was dirty. It's basically the same problem you'd get with a poorly maintained AR except that there's no forward assist to help you there.
What blows my mind is that this is supposed to be a modern design made by a very serious gun manufacturer and they made the oldest mistake in the book of making a bolt with very wide, relatively tightly-fitting contact surfaces with the receiver so it gets problems as soon as someone drops a grain of dirt at the wrong place inside.
And then there's the inevitable stopping power issue of the round itself.
If you want my opinion, don't be so sad you can't have one. Cool looks is the only thing this gun has.