Know you've already ordered, but the CH is softer than the NN. It also washes like a dream and dries in no time (mine was on the line for an hour today and is already back on the bed)! I like cotton pillowcases but always had a sore ear and was waking several times a night with this (amongst other things). I now put the CH pillowcase under my cotton one and its made it softer and a bit bouncier - no ear pain any more.
I'm a freezer, but a sweater (medical condition) so if I wake in a cold sweat (happens less with the CH than the NN oddly enough), I throw the cover open with a flick and toddle off to the loo. By the time I'm back, bedding's dry - no soggy bedding with the CH. OH is hot in bed but feels more comfortable in the CH - weird, but there you go. He loves the CH bedding. Never thought I'd hear him wax lyrical about anything from QVC, let alone bedding!
The ONLY reason I'd EVER go back to cotton (and then I'd resort to higher temperatures and one of those 99.9% kills everything additives first) is if I was in a situation where my bedding needed washing a lot due to incontinence type soiling.
The brilliant thing about QVC is the MBG. Try the NN and when you do, imagine something softer and cosier. Waking up in NN flannel was never like the CH - you just roll over in absolute blissful softness and never want to get out of bed again! Also, when your tumble dryer's been going for ages or you keep having to drag heavy, damp flannel in from the line, think of the dries-in-minutes on the line or in the dryer CH. It may be polyester, but trust me, it's nothing like any polyester you could imagine! JMHO.