Sorry if I'll be repeating anyone on the thread, just didn't follow 35 pages of it.
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I like my reader cases as slim as possible, with a wake/sleep feature and folding.
For me, a folding option is very important. By folding, I mean that the cover folds to a vertical stand, not that you have to turn the device sideways.
All those features I found in the original KOBO case and after 1.5 years of use, I haven't found any better. Unfortunately, it is black.