I have one of those too. It weighs about 7 lbs, and I use it when I take my big laptop. It is fine with a bigger screen(15-17"), used with my vArranger, as I don't need the screen as close as my Ipad.
It is built like a brick----, and not cheap.
pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact