Dude, they are proper acoustic room treatment mainly for soundstaging and bass control. You will still need to get dampening treatment from GIKAoustics etc. The old school way.
He did A/B demo with old school foam/cardboard/fabric boards (diffusers/abosorbs) etc and saw no difference between the two. You can have it running in 5 minutes and it's 1/10000 of size.
I'm guessing about 30% more expensive than the traditional ones though.