I ordered two of these Duvet Cover Sets, one for each of my beds and I couldn't be happier.  The first night I used them, I noticed that I was not overheating while sleeping, but I have to say further that it's been a little cold where I live, so that might have been due to the weather as well.  I purchased these duvet covers so during the summer, I can use them without a comforter which I'm hoping will be much cooler than a regular comforter.  During the winter, I can put the comforter inside the duvet cover, although, the king duvet cover was a little smaller than my king comforter.

The duvet covers and shams are beautiful in color and are very soft to touch.  There is ample coverage on the beds with quite a bit overhanging on the sides.  The shams are larger than a regular size pillow, just as a side note.  

I haven't washed them yet, so I cannot comment on that, but I assume there will be no issues.