These diffusers do a good job but are way too fragile. If you put them where you need diffusion of your room they do just that and with good result. But the styrofoam is just too fragile and just by touching them you get a white styrofoam dust on your fingers. You don't really need to touch them other then putted them up but I've accidentally hit them with a microphone stand and a bit piece got ripped off so you need to be careful.