I was interested in an SU-16 at one time (post Maura's decree), but my dealer talked me out of it. In fact, he had ordered in half a dozen of them and was sending them all back. Suffice to say, he was not impressed with the flimsiness and build quality and had decided not to carry the product for fear they would be nothing but trouble for him and his customers.
That said, I think the reviews here are fair. It is not an AR-15 clone. It's made of plastic, not metal. If you are expecting it to be an AR-15, you may end up disappointed. If you accept it as a lightweight foldable plastic substitute for an AR-15, it could work for you.