Generally this is pretty good and functions just as you'd expect.I was using mine to block sunlight and it has a loose weave so it's not like a blackout curtain, plenty of light will come through. It's also stinky but most tarps are and after a few weeks it doesn't smell that bad anymore.That said it does a good job keeping my room cool and a decent amount of light out.
Rating: [4 of 5 Stars!]