My wife and I have been using this duvet cover for a few weeks now. I really like it, works well with a natural wool blanket I bought. The blanket went in pretty easily, I appreciated the holes at the top left and right of the cover to put my hands in to lift and shake the blanket inside to get it situated.
My only negative is it came with one of the buttons to seal the bottom already off. I'm not a sewer, so it has been a little annoying having the blanket pop out at the bottom sometimes (since it was unfortunately one of the buttons on the very edge).
I'm hoping my button situation was more of an outlier, and they are generally sewn in better. But it's hard to give it a full five stars when it arrived like that. I would still buy another one if I ever needed one in the future though.