Instruct: Classify Amazon reviews into positive or negative sentiment
Query: ...because one star is as low as the ratings go!

Assembly directions weren't easy to follow. After assembled and filled with oil and fuel, engine started easily. However, after running in the garden for 3 minutes, the engine died and would not restart. One bolt fell out of the carburetor and a second one was loose. By the time I had changed oil the first time, I hated this machine. It is impractical to back up without pulling the wheel pins and placing in free-wheel mode. The wheel pins keep falling out. You can't back it up without straining a muscle in your back. And after a couple of hours, the tubular frame was twisted, due to the constant pressure on the handle trying to keep it going straight. It has a directional bias. It also does not steer well on a slight hill. Troy-Bilt should be ashamed releasing such a product!