I love them!  They’re not really blackout during daylight, but they do mute the light.  At night, they do block the streetlight.  We also have shutters, but the light coming through the cracks was what we wanted to eliminate.  These did the job.  For the price, I recommend!  I ordered two pair (this is one pair on the window).  Unfortunately, I didn’t look at them closely when they arrived and when I went to hang a few weeks later, the other pair was 84” length instead of 108”.  Wayfair’s customer service immediately took care of.