Keeps my room very dark and cooler without the sun ...
925340
Keeps my room very dark and cooler without the sun beaming into my room on the mornings so very effective.
2669935
For the price these do a great job at blocking out light. They of course aren't 100% sound proof, but they help keep my room cool and dark.
138594
Works very well. From outside it just looks like curtains are drawn. Very easy to install by myself. I've installed this film in 8 windows now. Doesn't work at night, but you can't see outside your windows at night anyway. I draw my curtains at night. During the day, you cant see in even when you're inches away from the glass. Also keeps out direct sunlight during the day. Good for keeping your house cool and reducing energy consumption. A little less light gets into each room during the day, however. Highly recommend!
2265021
I really like these curtains and the price can't be beat! We have an east facing panoramic window and used to get FULL, BLINDING sun in our bedroom in the morning. We put up these curtains and they really help darken the room to something much more manageable. These are not "vegas hotel-style" blackout curtains where ablsolutely no light comes in, but they cut the light down to about 20% from full sun. This is good for us because we can still tell when its daylight outside without the blinding light.
3157275
I like these curtains. They certainly won't make the room "black"-dark but they help to make it darker even in direct sunlight. They also block quite a bit of heat which was my real motivation. I also like the look with the grommets.
200158
Works well at completely blocking out light! And feels and looks great too!

Also makes our bedroom a good 3-4 degrees colder. This is especially great if you have a room that faces the sun (like we do).

The only reason i give it 4 stars is that it is pretty expensive
1392479
It does not blacken a room but that's not what I purchased for. I wanted privacy with still some light. Perfect for that and fit my door just right.
4643984
These things BLACK out my room like nothing else Ive ever used. Light fabric. Very easy to shift in and out of place on the rod. Super darkness in daytime, and I live in the desert!
1770461
So dark! They also insulate pretty well, for how thin they are. I'm typing this at 8am Sun has risen 2 hours ago and it's still pitch black in my room.
4680834
Installed these in my daughters room with the thermal inserts to keep her room window draft out and extra dark. She loves it and sleeps better now that her room is dark and our neighbors motion light don't shine through and she can feel how warm her room is too.
3753133
My son's window gets the full morning sun.  In the summer especially, this means that he wakes up WAY too early, so I needed something to keep the room dark. I am very pleased with these curtains. They are sewn very well, with good-quality fabric. They fit snugly on my 3" wide valance-style curtain rod. They hang nicely. And best of all, they do what they're supposed to do...keep the light out! No more 5:30am wake-up calls, and naptime actually happens sometimes now! Yay! And as a bonus, they do help to keep his room cooler on hot days.  I would purchase these again if needed for another room and I do recommend them to my friends.
2356005
These are so much better than the expensive so-called blackout curtains. Blocks almost all of the sunlight and keeps the room cool. Will be putting these up throughout the house.
4011286
Works perfectly, i had a problem where the sun shines directly into my room and after working a night shift i have to resort to sleeping on the couch to avoid the sun. These curtains are a godsend
4769660
These are really good both for sunny summer days and for darker nights especially. I can't sleep unless my room is dark and these blackout curtain have helped a lot. The same thing when it is really sunny.
1406870
Because that's how you get a dark room.. they are amazing. As for their claim on keeping heat out or in... I have not noticed a change.. but it makes the room black!
2505867
Does the job of keeping my bedroom dark so I'm not awakened by the sun early in the morning.
3555859
Perfect for blocking sun and reducing heat in room.