This strap is super cute. I got the Mametaro strap. The under-side works well to clean your phone screen. The reason I took off one star was because there is a little glue blob sticking out from the seam of the scarf that leaves a mark on the screen when you're trying to clean it. I have to try cleaning the screen without that touching it because it gets kind of annoying having to keep rubbing the marks it leaves off.
Overall it's a really cute strap, though kind of large to hang off my phone, and I'd recommend it to others.