Step 15: had I read all the comments, I would have avoided breaking the microphone connector (thank you Lorenzo Cangiano all the same!). But the guide should have a red exclamation point warning about not prying on the front of this connector when it doesn't respond easily to prying under the cables. It is not obvious that one should not be able to pry on all sides, and the guide only has an "Information" note for this.

I give the product an A (so far; it has just reached 93% charge after starting at 50 an hour or so ago, but it seems to be fine), but the instructions above a C at best (I think I am being a pushover; a real teacher would make it a C- or D+). The only difficult part (really the only part that is not obvious) is the tiny connector (black on one side, gold colored on the other), which falls out and then one has to look at the comments, and then look further on the Internet, to figure out what to do with it. Really, not to even mention this critical item (with its critical orientation), and/or show a picture of it even, is bizarre. Why?????

So kudos for making it possible, but please rectify this omission!