Point 1, the holder on the left side sits exactly between on-off switch and volume control. It is poorly ran to the keys. One point deduction.
Point 2, what I absolutely MissLungen find that the holder to lock the bag, is moored at the edge of the tablets and not to the bag itself. The holder can be fixed only with making power to the tablet. It's just a matter of time until the first pressure points are anticipated on the tablet. 3 points deduction.
The adjustable position are absolutely sufficient.
However, the bag's basic point 2 back.
I have now bought the original bag of Sony. Even if the price is too high, the tablet fits perfectly.