Anyone looking for a pure protective sleeve against scratches at the back, fit.
Dust is less because the dust becomes fixed under the cover. I carry the iPhone in the pocket of jeans. Since dust significantly. And the connections are obviously not protected.
When the iPhone falls on the edges, a new shell is due immediately, but that should be clear to everyone who chooses such a thin hardcover. I'm going to now get a softer PTU cover to protect against damage.