Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Noisy cover

The cover looks and works fine but it was terribly noisy from the first. It sounded like a can of washers was rattling around in the back and nothing I could do would stop it. I really could not find the cause for several months of the winter but this spring I lay in the back and kept pounding and twisting and pulling until at last I thought I had it. The joints between the bows and the side brackets would work up and down and make the noise. I took it all apart and removed the bows, then pulled the U clips off the ends. I tapped a 6-32 hole in both sides of each bracket and installed small set screws. I then put it all back together and tightened up the set screws until there was no movement between the bows and side rails. This fixed the noise but it should not have been there in the first place. Extang needs to do a little more engineering. If you do not want a rattling truck and don't want to make the repair. I would not buy this cover.