Assembly isn't hard when you have your own tools. I had to break out my ratcheting allen whenches to install the two bolts for the arms. They give you an allen wrench, very hard to use. After assembly, I got in for a massage. The massage , for me, was actually painful, and there wasn't near enough padding for the back and the seat pad almost non existent.  I would not recommend this model chair, bite the bullet and buy a better one, try it before you buy it.