We have not had a good night sleep in years due to the light coming in from the sides of our blinds. We thought about ordering new blinds but saw this system and thought we would give it a try. WOW!!!! What a difference! No more light coming in. Our bedroom is totally dark now, finally. On another note, installation took less than 5 minutes. We will be ordering these for all bedroom windows. Great service from Bob. Excellent communication. Super fast shipping. Well worth the price.