I bought a pair a year or two ago. Mine is like new. I love it and plan on buying the king size this year. I will say the cover belonging to my husband “died” shortly after purchase. I feel it’s due to facial hair?! I don’t know, he’s so rough on things, I let him know he’s no longer allowed. I wash on gentle and dry on the same and mine is still in mint condition.
I don't have the Slip ones, but I know what you mean about pillow cases with husbands though. All of my pillow cases look nice, husband's not so much...