When I became aware of the wireless charging option I decided it was something to try. I learned of various third-party offerings but didn't want to potentially degrade the water/dust resistance or possibly void the warranty, so OEM seemed worth a little extra money. Also, saw mention in various reviews of problems associated with some of the third-party options out there. I ordered this and the Samsung Galaxy S5 Wireless Charging Battery Cover (CG900IBUSTA).
Note - you MUST have either this back or some other charging back installed on the S5.
The charging pad is plug and play - literally. Plug the charging block (included) into the wall and the USB cable (included) into the charging pad. This is the identical wall charger that comes with the phone - so you now have a spare - bonus! No other setup required - except for installing the charging back on the phone. Looks nice as you would expect for a factory Samsung accessory - an attractive desk accessory. Small footprint, only 3x3 inches.
Charging works perfectly, dead simple. Using the Samsung system I have not encountered any heating problems I have seen mentioned by some, mainly non-OEM systems. Right off the charger my CPU temperature reads 93.5 and that's not hot. Right off the charger the phone back is only slightly warm to the touch, really no more so than if it had been on a charging cable. My impression is charging takes slightly longer (no empirical evidence to prove it) , but the convenience of not dealing with the port cover or cable more than makes up for it to me. Now whenever I'm not using the phone I just set it down on the charger and it stays charged. Answering calls or messages, I just pick it up without monkeying with a cable.
Some have noted that the pad is small - I don't see this as a problem. I have had no problems with placing the phone on the pad. The indicator light on the pad glows green when the phone is properly placed for charging, and I have not found it to be finicky at all. Nothing but gravity holds the phone in place. This should not ordinarily be a problem. If you have cats or kids or other critters that might disturb the phone on its perch, be advised.
Some have expressed dismay that it stops charging when the battery is full - well, good! Leaving a fully-charged battery on a charger is a bad idea. So overnight charging, in the morning my phone is at around 95%, and hasn't been charging a full battery all night. Pick up the phone to reset the charging cycle, put it back down for a few minutes and top it off. Tell me you don't pick up your phone first thing in the morning anyway! Not an issue to me, all chargers should be so smart.
I have really come to like wireless charging, especially knowing my phone's environmental protection and warranty remain uncompromised.