I really like this riser, and especially the removeable keyboard pad. I would give a 5, but I wish the keyboard pad could be located right at the front of the riser instead of being recessed, and its height could be adjusted. As is, I have to remove the keyboard pad when I sit at my desk because it is too high and might give me carpal tunnel. I&m stuck with using the keyboard pad at my old desk when I sit. Other than that, the riser functions smoothly and is great to use when standing.