I love my little Carbine. I've got about 6 or 700 rounds through it with no issues. I did have an issue at first with a factory mag. Wouldn't feed right and got the occasional stove pipe. I took the mag apart and put it back together and its worked fine every since.
Mine gets put on HD duty once in a while. Its main use is varmint control around the farm here. It is certainly a handy little rifle thats light and small.
My one issue with it is that it has the flip up sights, which are a little off. I can never get the hold over correct. So, I think i might get an Ultimak rail for it and put an optic on it.