I just got mine last night and the slide on cover wiggles around loose by a few millimeters when slid on with the screen viewable. Additionally when the cover is closed on the screen it doesn't feel solidly locked such that if you hold the device wrong it may slide out and drop on the ground when you are carrying it.

It may be just me, but I'm used to those old TI calculators that has a solid slide and clunk on cover.