This rolling mechanic_ stool works as intended, but it_ overpriced for the quality, the instructions are poor, and some of the hardware isn_ ideal. But it_ surprisingly compelling, anyway.The directions are just a diagram. If you are handy with assembling stuff, you could probably put it together without even looking at the directions, but for someone like me, I would have liked to have had things better explained. You get four large washers and four small washers, and they are lumped together as the same item in the instructions. I figured out that the screwhead that goes with them would go right through the large washer, so I put the small washers next to the screwheads. But then the big washers seemed a little big for the nut that goes on the other end, too. It works, but it doesn_ seat completely like it should. I think it should have been eight small washers.The casters are difficult to get started in screwing into the frame. What finally worked for me was screwing them in from on top (holding them upside down) and being careful to keep the screw very, very straight while applying a little force. Shouldn_ have been that tricky, though.There are multiple little irritations about assembling this thing. You do get the wrenches and screwdriver you need, though if you have your own tools, those will probably work better.The two side trays just set in there. They stay in place okay except if they get bumped or if you pick up the stool. Then they fall right out. Bad design.The drawer is okay. It doesn_ lock in, either, but you_ have to tip the whole stool forward to lose it.The seat part is designed well. It_ comfortable, especially with the cushion in place.The casters roll fine. If you_e on a smooth floor, you can move around pretty easily. I inaugurated my stool brushing our dog. He likes to squirm around and get closer and closer to me, making it difficult to brush him. I usually brush him standing up so that I can move around, but it_ a killer on my back after a while. With this stool, I could back away from him and maneuver around easily. And the trays made a good place to stash the hair I pulled out of the brush. Quite honestly, I wish I_ gotten something like this for brushing our dog long ago. And I can only imagine how many other tasks this is going to make easier.I can_ get the brakes to engage. They probably do work, but it takes more force than I_ willing (or possibly able) to use. Those could definitely be designed better.I was so irritated by those poor instructions and hassles of assembly that I was going to give this two stars. But then when I actually used it, I really liked it, so I thought, okay, fine, three stars. And then I went to find something better, and, quite frankly, I couldn_. So that_ why I_e bumped it up to four stars. I found some mechanic_ stools that were half the price, but they didn_ have the curved seat that this has, which makes it more comfortable and also helps you to keep it under you as you_e scooting arou