Product works, but when you go to purchase it, and you read the description, no where does it tell you that it is a fast charger. I have a Samsung Galaxy S-7, and it works great as far as contact and charging with my phone. But my phone came with a white fast-charging wire and plug, and trust me, my factory wire charger will do the job in less than 1/3 the time.
The ONLY FAST WIRELESS CHARGER THAT SAMSUNG SELLS IS THE NEWEST ONE THAT COMES WITH A STAND, THUS YOUR PHONE DOES NOT LAY FLAT, BUT IT STANDS UP, BECAUSE THIS FAST CHARGING HAS A STAND. What I've had to do is plug in my fast charging wire and plug both into the round, flat charging device. The instructions advise against doing this, but so far I've had no issues. As of 09/16/2016, Great Offer Stock HAS NOT sold the wireless fast charger, so if this is what you're looking for, don't buy any flat chargers they are offering. Wait until they offer the one that has a built-in stand.