The fit is perfectly (not too tight, as already described), the device can be easily removed and still not "fluttered" in the bag around.
The lock engages properly, without impeding upon opening. There are no metal parts visible, which could damage or scratch the inserted device.
The bag is "slim" in form and contributes only slightly more, so that it is not unpleasant to use them.
Nevertheless, I values from a star because the price I think is unreasonably high. The 20 - limit should not be exceeded, then it would be a product without frustration and blame and could even generate enough income to producers.