I read the reviews and thought, “how bad could a screw be” Never met a screw that could defeat me... until this arrived. It’s true, the screws will “screw” the whole thing. I put the entire chair together is no time... it’s just the base and two arm sides. Attached everything with ease. There are instructions but you really don’t need them. It functions beautifully, with many many settings and puts out some great heat. It was working fine until I went zero gravity and the arms fell off! Why Because the screws wouldn’t fit, and I skipped it and figured it would be okay without it. Boy, was I wrong. To adequately use the chair... you need the screws installed. Disappointed. One star off per screw! Hope you have better luck!