I have long hair and I live in Florida, so my pillowcases tend to cling to my hair and create static and "bedhead" in the morning. I had read ads that said silk pillowcases were cool to the touch and were great for long hair in that they did not cling or create static. So, I decided to try this one.
Note that since these are silk, they need to be treated as delicate, so when I did wash them, it did it on the delicate setting. I did not dry them, but hung them on a hanger to dry. They came out not very wrinkled that way, and once I put them on the pillow and slept on them overnight, the wrinkles came out. Overall, I would prefer not to dry them, as silk does better if not dried, and I really don't care if my pillowcase is wrinkled anyway.
While sleeping on them, my hair did not cling to them like my other pillowcases, and when I got out of bed, my hair was not standing up, so no bedhead. They feel very nice to sleep on and are quite comfortable. They are cooler than cotton pillowcases.
At under $30 per pillow case, these are nice and luxurious, and, as silk pillowcases go, the price is not overly high. I do think that if you main requirement is a cooling pillowcase, tencel may be a better option.