For my iPad Air, the shell does not fit exactly as it stands up (camera) and the bottom (Home button) several millimeters above the protective sleeve also. At the corners and the side, it fits perfectly. The shell is also not right to, so you in the volume up Volume Down keys the envelope a little "push" can. The creaks then beautiful;) Since it is a hard case, so plastic, I have "fear" that could scratch through the small leeway that device.
What bothers me most frankly am (is not now dependent on this product), are the lack of weight. If I have a iPad Air've, I would like to also have a lightweight protective cover. This one weighs about 185 grams and is therefore, in my opinion, relatively heavy.
I will return this envelope definitely because of my room on the side not like the iPad something stands out and me is just too difficult.