This particular projection screen reflects the light from the projector for greater brightness and better colors, it really works BUT the projector must be positioned in the center of the screen and close to the viewer's head. In my case, I have placed the projector on the ceiling and the reflection occurs higher up. Also, no matter how much I iron it, it doesn't flatten out at all; a regular white screen would do a better job.

This specific, as well as all so-called "anti-light" curtains, have no difference from regular projection screens or a freshly painted white wall in terms of lighting. It cannot be ironed at all, so you simply have a wrinkled piece of fabric to remember the worst purchase you have ever made in your life. Give your money to something that truly has value or to a friend in need, don't throw it in the trash.