My laptop is a nexus4 with a protective bumper, power is at the bottom of the phone, I can use the lower tab on support because it prevents me plug the micro usb power cable. Fortunately she flap and side fasteners are sufficient to properly maintain my mobile in the holder.
In conclusion, for the price this product without fulfilling its role to be great, it is a good alternative to the suction cup-based systems or clips on the ventilation grills. Customized systems for every type of vehicle exist (ProClip) but they cost twice the price!