To write 20 words about this piece of carbon black carbon look plastic hard for me. The glued rubber pads dissolved already at the first viewing, the material really is not nice to look at. Sure it will fulfill its purpose under the laptop on the desk, I bought it because it had a low front edge and so would not be disturbed while writing on the laptop keyboard.
It went back but since not appeared adjustable and there a little too flat. Improved ergonomics is supported but definitely by the stand.