The shade completely darkens the room and the timer/automation works great. We installed it behind arched plantation shutters and it fits perfectly- we just made sure to measure with the shutters closed before ordering. We ordered blackout shades because there are bright lights outside of our window at night and it makes the room bright even with the shutters closed. We are trying to balance our circadian rhythm for health purposes so having a blacked out room and then setting the shade to open at sunrise so we can naturally wake up with the light is the best!