I have about fifteen of these panels (including ceiling panels and smaller ones), along with eight bass traps in my recording studio. It's a challenging space, and the midrange and higher frequencies are now significantly reduced. All the panels have some kind of damage from transport. That's almost inevitable, as they're so fragile and sensitive, including fingerprints and the like. Usually, the damage is minor, like a folded section. I had to return one large ceiling panel because it was completely unusable due to the damage. I replaced it with two smaller ones. Installation is quite easy. They also look sleek. They're very light, so they can easily be attached to a plasterboard ceiling. All in all, good value for money.