First its main function is to protect the phone ==> Failed. Indeed the valve is not equipped Magnet fact it is not kept open. If dropped what could happen.
Then its load function. Positive side, the coil works well. However if you intend to use it with a car induction charger will not work. Indeed the induction does not pass through the flap ... it must be folded out behind if we want to see something.
That's when you see what kind of products we know that Apple still has a bright future ahead of them.