By matt back of the envelope, this feels more comfortable in the hand than the glossy-smooth sides of the envelope.
The fact that the volume and power buttons are cut out, this can be operated well. The pressure points are the same as non-enveloped. On the volume button I get along well in the Power button I have to use the fingertip a little more. This is because the cut in the shell by the smaller button is indeed small. (This is of course dependent on the finger size of the owner).
With the shell charging means Qi Wireless Charging still works without problems.
I ordered was at 20.11, shipped on 21/11 and then German Post took place on 26.11. to. I think that is absolutely fine for letter delivery from the United States.
I would buy the shell again.