After reading tons about how awful the cheap foam stuff were for sound treatment I was reluctant to buy these. But when the good stuff is more expensive than what you can allow yourself to invest in the spare bedroom/home studio, I thought these were worth a shot. And yes, the colour scheme were the main reason I went for these.
And I got to say, I'm impressed! I combined these with a couple of diffusers and a few bass traps, and the room is like a different world. I can actually hear the bass frequencies, and the flutter echo I've almost gotten used to in my vocal recordings is now completely gone.
Now, has this changed my spare bedroom to the next Abbey Road? Probably not. But holy shit, my room is actually not actively working against me any more, which feels kind of nice. These "cheap foam things" aren't the greatest, but trust me when I say they're infinitely better than nothing!