Like most tablet desktop mounts, this one is primarily designed for a thin desk edge, which was a bit uncomfortable . It is mentioned in the product description, so be aware. Luckily I was able to attach it to the side of a table and ended up being pretty stable. I've used it successfully with my iPad and Onyx Boox Note (stays in place all day with no kinks or movement after tightened with an Allen key). I just wish the arm extension was a little longer and the clamp a little wider.