I will often go through at least two or sometimes even three different types of cases for some devices. However, at this point, I cannot imagine ever needing another case to replace this one. Amazon designed an almost perfect case for their equally well designed Kindle Paperwhite in my opinion.
I've had this case for about a month now. It provides excellent overall protection for the device. One thing that I love about the Kindle Paperwhite is the lightness, which aids in a great reading experience when holding it for long periods of time. It does add a bit in the way of thickness - the bottom shell is nearly as think as the device itself - but I bought them together, so I really didn't use it much without the case anyway. In fact, I personally think that it makes the Kindle Paperwhite even more comfortable to hold, even with the cover folded around to the back like an paperback book. Again, the thickness of the shell hardly adds any weight, yet the durability of it is excellent. Although I don't intend to test it myself, it seems as though the shell will provide a good amount of shock absorption if the device were dropped onto a hard surface from a height of a couple of feet.
The bottom shell fits very snugly onto the device, and I have absolutely no concerns about it loosening over time at all. The Kindle Paperwhite snaps into it easily and securely. It is molded perfectly to fit the device like a wetsuit. However, removing it can prove to be a bit difficult. The only reason I did remove it once, though, was simply to see how well it would work. I would definitely recommend only removing the device from the case if absolutely needed. Even then, you need to do so as carefully as possible to avoid bending and possibly even breaking the device's screen. I have had no reason to remove mine again, though, and I doubt that many others will either for the most part. In fact, there is a nice opening in the shell around the bottom of the device that allows for easy and complete access to the physical controls and input whenever needed.
The cover's surface has a nice texture and, although it feels a little more like plastic than leather to me, it is nice to the touch and provides what I think is just the right amount of no-slip grip when holding it. As you can see from any front-side images of the product, the case also has a nice magnetic enclosure on the right side of the cover that keeps it closed when it's not in use. The Kindle Paperwhite goes to sleep automatically when the cover is closed, and springs immediately to life when the cover is opened. This is obviously not the first time that this type of mechanism has been seen on a device like this before, but it's very effective and a welcome design element that enhances the user experience. The inside surface of the cover is soft and provides excellent protection for the screen when closed. So much so that I'm not even considering any type of clear screen protector to add to it.
Overall, like the Kindle Paperwhite itself, this case is not 100% perfect. However, I can't imagine anything else out there even coming close. I won't likely find out myself if they do either because I really don't foresee owning any other case for this device. This fact also helped me justify the price. Amazon did a fantastic job of designing the ultimate case for this top-notch e-reader.