I spent over an hour looking for a good quality, but affordable duvet cover. A lot of options out there are either lying about their thread count ($25 1200 thread count duvet cover? Yeah, no.) or are microfiber. I was originally looking for Egyptian Cotton, as that's sort of the high quality standard, but all decent Egyption Cotton duvet covers seemed to cost in the triple digits.
Pizuna Linens talks about the quality of their cotton. You really don't see that in most products like this. It's a really good sign. The picture of the duvet cover looks great too - very plush, next to no wrinkles. Great.
In reality, they're... pretty close to what you see in the picture. My duvet insert is thinner than the one they used, and I haven't used fabric softener or done anything to remove the wrinkles it has from being in the package, but it's pretty close to the picture despite that. These duvet covers are soft. They're high quality. They're a better value than what I saw of duvet covers in this price range (~$40), and potentially as good or better than a lot of more expensive duvet covers, at least until you get to the $100+ range.
These may not be Egyptian Cotton, but they're legitimately good quality cotton, they're soft, and they're awesome. Definitely recommend.