They said "no, you have to take the phone out of the cover to charge it". Well, anyone who has bought one of these covers will know that the hard back is not easy to remove, certainly not the sort of thing that you would want to do often. So I just resigned myself to having to use the USB charging cable instead.
Over time, the USB port on the phone wore and the flaky connection started to get a bit annoying, so I just took a punt and bought the wireless charging pad and just hoped.
I've never had any wireless charging pad before so I can't compare it's performance with anything but to me it works with the usual cover on my phone still on just fine - just rest it on the pad, either way up (I prefer to use landscape mode) and it reacts and gives you charging details straight away.
I just should has bought it much earlier.