This desk was easy to put together, took about 2 hours considering the multiple pieces and reading the directions thoroughly with each step before proceeding.I used the wheel casters. The wheel locks work very well and unlocked the desk rolls smoothly without any kind of tipping on my laminate floors.The up and down motion of the desk is smooth. Programming settings is very easy. I’ve read several reviews where one leg was immobile. I put together another adjustable desk for my girlfriend and I had the same problem. But it was because I didn’t have the adjuster rod inserted into the leg that wasn’t moving properly. I reassembled that part and it worked perfectly. I was very aware of this issue while putting this desk together so I had no issues.The drawers fit into the spaces. They work just fine.This is my second Fezibo adjustable desk. No issues at all. If you want to save some money and not buy top of the line, definitely purchase this brand. Absolutely serves its needs as a no frills but reasonably nice looking, but solid and reliable piece of furniture.