I use Kitsch satin pillowcases for more than 5 years now, and I am fully satisfied!!! Quality in a reasonable price.
I have already tried the monochromatic cases (in silver, white, lavender, and blush) and now I can NOT return back to cotton pillowcases!! Apart from the health benefits of satin (antimicrobial), is so much softer in feeling, and makes sleeping a much more indulging experience!
The funky designs of BT21 make the pillowcases much funnier ! Every night when going to sleep I meet a "happy face" on the top of my pillow!!!