Okay, so I had room darkening curtains on a regular curtain rod and had to tack down the sides because light would peek through the sides of the curtain & it irritated me. So when I saw this curtain rod, I got excited. This rod does exactly what you would expect it to do! It is PERFECT for room darkening curtains and I don’t have to tack anything down. If you’re on the fence about trying these, don’t be! You won’t regret it!