It does not work to recharge my Nexus 4 and will not work to charge a Nokia Lumia 920, these two phones are yet natively with an inductive charging system. In fact this rug will never work with nothing except "Powermat" products (when they exist).
To use it on my Nexus 4, we must buy small additional modules to connect / disconnect the micro-USB port. Now this is nerd I just wanted to free myself of cables and other merdouilles to connect and disconnect automatically. Ultimately this rug adds an extra step to recharge a mobile, it is the epitome of absolute futility.