I ordered the premium microfiber pillow encasing after I learned that I am allergic to dust and dust mites. My allergies are really bad, so I was hoping that this pillow encasing would help me (my allergies are worst when I go to bed). As a matter of fact, it did. The material is incredibly soft - so soft, that you would not even notice if you weren't using a pillow case. Additionally, it does a great job and helped reduce my allergy symptoms a lot. The quality seems really great and while I only had it for a while so far, I am a big fan of it.
I can definitely recommend this product - while it's more expensive than the other material, it feels very soft and helps a lot, so it is worth the investment.