I know the price is attractive, but I really can´t say these would be worth a penny. Maybe if You just want to fool Your granpa thinking You have a nice little studio, this product might do the trick, but in my eyes these even look too cheap to put on my walls. The pictures on this website gave me the impression they looked awesome, but when I first opened the package I got an massive facepalm immediately, the material just looks/is the very cheapest money can buy :
If You want to improve your monitoring, this product will not do it, it will just mess it up even more.
The density of these has to be something like only 0-3 kg/m3 (not kidding) wich is totally rubbish, they won´t absorb anything except for the absolutely highest frequencies and absorbing only those will let all the rest bouncing all over the room making Your monitoring just more imbalanced.
so in short:
if Your only after the look: think twice, might not look as pro in live as You think.
if Your after better monitoring: stay away.
instead of buying a lot of these, buy less of something better. A set of 16-20 this size of panels are enough to do wonders for Your monitoring when placing just in the critical spots, so it´s better to buy a set of better panels and later buy more if You want. Better one´s should look better too when made of decent material :)
That´s what I´m gonna do..