The screws are not long enough, especially in the top back cushion where most of the back and forth will occur

Only 2 screws on each side hold the top back to the armrest

it's very comfortable however when you lean back in it.also the construction of it at home, not the best instructions, and a couple screws were uncooperative

The screws are just long enough to reach into the chair itself, but if you tighten one side too much, you can't screw in the other side