Alright so I got them today!
First off, the stock back cover IS NOT a wireless charging back cover as there was some confusion about this. Yes it has contacts on the back but the actual wireless charging back cover has some differences. First off, it has the two contacts that the stock one has but on the other side it has four contacts. Also it says "Nokia wireless charging cover" on the inside. Here is the biggest difference though, it's a bit thicker and heavier. I am not saying it's this HUGE back cover or anything but it does make the phone EVER SO SLIGHTLY thicker. I actually like this. Why? Because my stock cover was getting a little scractched up where the Carl Zeiss logo is (I do not use a case for my phone). The Carl Zeiss logo, the camera, and the flash are all indented a bit now so they won't get scratched. Good for those of us who do not use cases! Oh and yeah, like I said its a little bit heavier. You cant even tell with the cover on the phone but holding JUST the back plates you can tell which one is the wirless charging one (heavier).
The added weight and thickness is so freaking minimal I hope it doesn't turn people off from getting these accessories because really, it's a non-issue.
The charging plate (black) works as advertized. Plugged it in, laid my phone on top of it - started charging. Took the phone off, stopped charging. I have yet to test times for charging but it will be the charger in my bedroom so I really don't think I will ever be able to gauge it as I plan on using this only when I sleep. Which rocks because fumbling with a phone who's alarm is going off when you just wake up and it's plugged into the wall can be messy sometimes lol.
Either way, anybody interested in these accessories I say go for it! It's so easy to use and IMO makes the phone feel better in hand and protects the camera better if you don't use a case!