These sheets are incredible! I tend to prefer percale sheets because they're crispy and cool, so a pure cotton sheet like these arent usually what I use. That said, these are the softest, coziest sheets I've ever used. From the moment I I out them on my bed, I knew I was going to sleep great. And I did! 
These sheets fit  very snugly on the mattress. The fitted sheet was a little hard to get in, and I have a standard mattress. I assume they're just a tight fit. It worked out because I love very smooth sheets that don't bunch. Just be aware they require a bit of work to get the fitted sheet on. 
Aside from that, they are perfect. They're very silky and soft, they stay cool (which is important for me). Because of the tight fit, even after a few days they don't loosen up or bunch. A nice bonus is that because the material is so soft, the pillowcases are great for reducing frizzy hair!