How can something be so light and so sturdy? I have no idea, but this is. Adjusting it takes a little patience but once you figure it out, no big deal. I use it for large books so that my arms don't get tired, but mostly to stand up to use my laptop (on the kitchen counter). I do have a different keyboard on the countertop, but this is a great way to not have to always sit when working. It comes with extra parts to make it versatile.