We have a window in the bedroom that lets in a lot of sun exactly at noon. As a result, my youngest can't sleep and it gets very warm in summer.
These curtains have definitely helped and significantly improved the situation.
It is dark enough for the little one to sleep and it also gets less warm.
I also have the feeling that when we pull them outside the open window at night, they muffle the noise, but I don't know if that's more than ordinary curtains.
The look also convinced me, although the side facing the window is not so nice, but otherwise it would of course not block the sun/heat.
Overall, we are very satisfied with the purchase.