Bought this as my new office chair in the sunroom that had a countertop. Came in a big box and I was dreading to set it up, but it was super easy. Just 4 screws to the seat with the backing, another 4 screws to the seat with the adjustable stem. Plug the stem to the feet stand and plug the seat in! It came with the Allen wrench, so no other tools needed. This chair is so sturdy and nice that I don't have to be afraid when my petite 5 hear old is climbing up on it. It does not tip over.