Yeah, I got the official wireless charging kit (back and pad) for mine as I was worried about the USB cover's long term durability. It adds a little bit of bulk to the phone (the wireless back is thicker than the standard one and is maybe 1/4mm beyond the camera lens ), but I prefer the look and feel of the phone with it on.
Performance wise, I can't fault the wireless charging - I was so impressed with how well it works that I've also now got a charging "orb" to use as a nightstand charger and also a wireless charging cradle to use in the car.
If the S5 didn't have the USB cover I would never have considered wireless charging but I'm pleased I did because you can't beat it for convenience