These liners are amazing.  Nice and thick, and do exactly what they claim.  I recently moved and my new bedroom has a double window on the side of the house where the sun rises.  With the liners, you'd never know the sun was shining directly on my windows...they really do block out all light, and they are so versitle, that I know even if I decide to change my curtains to a diffferent style rod, I'll still be able to use these.  I am VERY happy with this purchase.