Won the X pattern non-slip rubber pads on the Xpad block the ventilation holes of my laptop?
No, they won’t. There are rubber feet on the bottom of your laptop that will sit on top of the ‘X’ pattern rubber pads on the Xpad. The rubber feet will provide clearance between the bottom of the laptop and the ‘X’ pattern rubber pads. The laptop’s rubber feet on the ‘X’ pattern’s rubber pads create a high friction rubber-on-rubber contact to provide a non-slip interface between the Xpad and your laptop without using any awkward straps — your laptop will feel like one with the Xpad.