The hardest part is lining the back up for the 4 screws that secure it. Do not tighten up any screws until the very end. If you tighten up after each step you're screwed haha.
I've had three of these they only last for a year this one first week the arm pad pulled out thankfully I got the warranty so they will be sending me another one as soon as I call. It is comfortable the shipping was fast and assembly was good. Still cheap. But we knew that!
The chair is okay seems to be comfortable and should last a while. One of the seat mounting bolts was stripped out and no way to fix it without taking the chair seat apart. Hope it holds iup. Remember: you get what you pay for.
The hydraulics failed and the chair will not stay up. This is the replacement of a chair that had the same issue. I'm not sure I want to purchase another one from you. They all keep having the same issue...