I just bought two of these for my bedroom windows. They are fantastic. If you are looking for curtain liners to not only keep your room dark, but to help hold out heat, these are the one's to purchase. I thought about going to a hardware store and purchasing material for a DIY project, but I'm glad I spent the money to buy these instead. A little pricey for my liking, but I'll definitely purchase again for my guest bedroom, living room and dining area. 

Pros: Soft, they don't smell chemically, and fit my windows perfectly.
Cons: No Cons.