Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Quality material, shoddy construction, not evenly round

Ball is made of a very high quality rubber compound that is very tough and resistant, but construction is very poor. When the ball is inflated, you can see thick and thin streaks throughout the surface. Surface of the ball is rough, not smooth as it appears in the pictures. Very out of round, has "flatter" spots. Definitly would not purchase again.