I don't own one but I have had the opportunity to shoot a couple. Both operated flawlessly with off the shelf ammo. One was being fed the MFS stuff. Not a hitch. I only fired 20 rounds out of each of them but they were comfortable to shoot, finished better than I expected and about as accurate as I expected. Two inches at 50 meters was about all I could get out of them. Normal.
If you're planning on picking one up, go for it. Especially seeing as they are non restricted.
I have heard and read rumors about poor feeding and stovepiping. That wasn't my experience at all.