I started buying these type desks for my computer/electronics area and this is my 4th set. I have back/neck problems and I need to constantly change my sitting/standing situation all day. Even though I am disabled this allows me to do small projects and keep my mind/body still active some rather than sitting all day watching TV.These stands have a good load capacity of 176lbs or so and have no problems moving a simple computer or project up and down. If you know anything about electric motors, syncing has always been an issue with these type legs if you try and use dual motors, which while it can be done, you have to use stepper type motors to get that synch which requires electronics and a little more time in setting up (think of a 3D printer). By using one motor to drive the unit by a shaft to the other leg, assembly is easier and basically done in minutes.While I have only had one pair of legs be uneven, I dod believe it was due to my installation as it was my first and the desk still functions fine, and I can fix it later. As long as its not so bad things are rolling of the desk its not an issue.As for a top? You can use anything you want, depending on the room you have it in. One top I have is press board covered in wood veneer which is a bit flimsy but works. On a few other desks I used simple old doors I am replacing in my house. They are thick, heavy and provide a surface I am not afraid of burning with a soldering iron or getting cut with a knife. The options/choices are limitless.So no problems with setup/installation or recommending these for anyone for use.