Many advertisements for a device that does not deserve much; This device remains CHER andit is too clumsy, power and efficiencies of dicutablent ventilos. device too pointed and too high, my 17-inch Sony VAIO descends slowly but surely down because of this too pronounced angle. Also I wanted aluminum color, but I had to cancel my order because no way to be delivered and to take it black so I'm disappointed with my purchase.