I have the Note 4, but I'm in the same boat you are. I got the S-view cover that enabled wireless charging, and put the guts of that into the "normal" back so that I could choose any other cover. Those chinese knockoff chargers are both dangerous and cheap, both in price, and what you get for what you paid.
That said, the wireless charging pad itself requires a 2A charger, anything less than that and it will be extremely slow, if it even charges at all. Also, if you have a case on your phone, that will slow charging down if it even works at all. Keep an eye on the temperature of the pad and receiver.