I received these chairs for my birthday but put off assembling them for a couple of weeks. Assembly was not easy without power tools, with a lot of bending over them as you assemble them. Also I wondered why they put an additional envelope in the box with some extra washers and screws. It turns out that the vacuum sealed collection of screws, washers, and tools were a few short and these were needed. It is good that they realized this before they sent out the chairs. Although I say assembly was not easy, it wasn't really hard either. The instructions were clear, and the drawings that were provided were helpful. It is just that assembling them on the carpeted floor involved a lot of bending, stooping, and kneeling. The tools they provide are all you need to assemble the chairs.These are being used on my back patio, and everyone who sits in them tell me they are comfortable. I find them to be comfortable as well, and they swivel easily. The leaf spring rocker is till stiff at this point, but I know they will loosen up with time and rocking. Overall, well worth it.