I have already recommended to my daughter-in-law to purchase the room darkening Single Panel Curtain Liners. I highly recommend them to anyone who wants the feature of darkening a room AND, most important of all, to keep the heat out. The Temperature has been reduced temperature by at LEAST, 20 degrees!!! The sun would bake the room every day during the summer months. I LOVE them and wish I would have thought to buy these panels a long time ago. GREAT PRODUCT and the description of this product was right on.Pros: GREAT value, GREAT product. I LOVE these panels. Cons: There are no cons, but a remark that to make sure which panel you select because they come varies types depending on which curtain and rods you have.