I had tried some other models before this and am finally landed in properly. The processing is not the industry's highest quality, but with some consideration no problem at all. It's super easy and nice thin it! I did not need any instructions to build it ... yes ... something I do not already happened. 2 different heights with 6 angles. My Latop is now on my table at eye level and my neck would be. Non-slip through the two slip-resistant bearing surfaces that are black in the picture. Since shifts nix.