Works, but adds considerable weight/thickness
Back cover works well and quality is excellent. However, it does add quite a bit of weight (relative to phone) and thickness. Whereas the original cover is so thin that it leaves the camera bulge, this wireless charging cover goes beyond the camera and actually leaves a recess.
Also, not sure if it is a problem with all white covers, but this one has a slightly slippery feel compared to my old black cover which gives a better grip.
Because of the above, I'd probably leave the charging cover at home, swapping out my old black cover when I want to use the wireless charging.