Cover versus case
The smart case is not worth the extra money for my uses. It stands up poorly compared to the cover, and you can’t just pop it off when you want to; I also find it hard to close correctly (the right edge catches, so the whole thing is folded a little bit). Both the cover and the case seem to concentrate all of the grease into little bars from one end of the screen to the other, but that’s advantage nobody. That said, I’m not going to throw it away, but if you’re happy with your cover, keep it.
Also, I learned a trick from Arden: use the microfiber liner as a wipe to clean the screen.