It is Slooo-oooow.
This charges the phone with fast charge.
I should note that I don't have a fast charger wall wart, and don't need one, since my phone charges quick enough with just a regular adapter or off the USB port on my PC.The charger displays blue at all times when plugged in, and green when the phone is charging.
I just realized that there are not many times that I charge my phone where I am not needing to still use it, so I keep this as an extra charger when I can leave it be for an hour or so to charge.
This works great I put my galaxy in its case on the stand and it charges great...I bought I recommend.
Other than that I cannot get this to charge my phone with my protective case on it.
When I came home today I placed my phone on the charger (after being low to start the day my phone was now dead by the end of today) and the phone said "wireless charging 3 hours until charged".
Well it's only been about six months and two out of three are in the garbage.
I believe it was because of the phone case, but since most people use phone cases, that shouldn't have been an issue.I had to turn the phone sideways and keep adjusting until it started charged and rarely did it charge all the way before it stopped.I would try another model before spending money on this one.
It does work when my phone is out of my case quite well.