I've chosen the cover, as it protects the glass edge of the Z30. After a fall, my screen was splintered as the glass edge is at Z30 to the edge of the casing. The Prima Case Cover protects the edge and is bearable with about 1.5 mm thickness additional. All openings are carried out correctly and can be easily reached. Power button and volume buttons are pushed through the sheath, which works well. The plastic of the casing is sufficiently smooth so that the Z30 can easily plug it into my pocket and pull it out again.
