I've heard they have awful triggers, terrible ergos, have a lot of recoil and break the firing pin if dry fired. It seems like the gun would be a decent design if it were a 9mm, but 7.62 Tokarev is too much for it.
I got if from CDI Sales on Gunbroker. It was the nicest blued examples I they've had recently so I jumped on it. The blued guns don't come up much, but they have had a bunch of good condition enamel or phosphate coated ones for sale lately.