Pros: The main obvious benefit to any of these wall mounted desks is space saving. When your desk is "floating" you lose the legs that get in the way. Offered in different styles and colors. Positive customer reviews that you can read for yourself. Designed for easy management of cords and power bars etc.
Cons: Most reviews are positive, but a few mentioned the difficulty of setting it up. Read all reviews good and bad through product links on this page.