However skeptical I might be the thing functions flawlessly and is the closest thing to shooting a semi auto MP5 that you will ever get. The added advantage of a bolt hold open is nice. Plan on dropping some money and time on upgrades for the charging handle, trigger, safety, sling points and magazine release - they all rate 1 star in stock form design and function. It is a toy waiting to eat your hard earned earned cash.
It will either bounce or break when you drop it. Laugh or throw up when you pull it apart and see what you just paid $1,000 for. I laughed. I don't expect a long service life for this weapon. It flat out isn't designed for durability. They should cost $500, but they don't so get one while you can.
Do the upgrades, mount an MRO, stick a suppressor on it and play with it like any grown up kid would do. It's fun to shoot and 9MM - what's not good about that.