Any heard of Sound of Science room treatment

I’ve seriously considered ( after many  years & ears ) to treat my room with broadband panels along  walls.
Obviously there are better and worse, does ” Sound of Science ” mean anything to You?
Believe it’s a Belgian company suppose to have great effects on 250 hertz and uppwards  Any experience, I’d be deligted to hear 👍
Happy midsummer!

Respect Corona 😡