Galaxy S3 Wireless Charging?

[gadgetsguy]

Anyone have any experience with these pad style wireless charging systems? I am interested in giving it a try but hope for some feedback before I drop the $$

This is one I am looking at in particular but I assume they all function the same way:

5500mAh Wireless Charger for Samsung i9300 Galaxy S3 - White + Black - Free Shipping - DealExtreme

thanks in advance ~j