At the Kensington Easy Riser is not a bad product. This scale runs completely to set it in four different heights. The rubber coating and the raised edge at the bottom like so that the notebook is not slipping and is safe. Unfortunately, the riser has but given up the ghost after only 3 weeks! No longer stand and sliding down to the nearest level by - The locking at level blue to carry the weight of the notebook (4.2kg Asus G75 17 inches). This riser is of course completely useless!