Big and sturdy. The desk moves up and down smoothly and quietly. We had a bit of a hiccup when assembling which turned the 30-minute assembly into a 3-hour ordeal but I own some of that. I am not in love that the top is sectioned so that the mouse has to get over the hurdle where one piece meets another, but I knew it was sectioned going into it. Again, the price was right. I consider it a starting desk for seeing if I even like walking on a treadmill whilst working.