The origami case is an interesting product, it is well constructed and it feels like a lot of care has gone into the design. The back panel hugs the kindle well, and rather than cutouts for the power and volume buttons, the case incorporates its own buttons in the correct place to allow you to interact with the controls. Its a nice touch that the kindle recognises when the cover opens and closes, and that when you slide the kindle upwards in the case to expose the viewfinder and flash, the camera mode launches automatically.
For all these smart design features, and after designing a tablet as superbly lightweight as the Kindle Fire HDX, it seems odd that this proprietary case undoes all that hard work. The case makes the kindle stupidly heavy and uncomfortable to hold, and the origami folds that allow you to prop up the kindle into viewing positions only add to the discomfort as it tends to sag and force your hand to compensate for the lack of stability.