I bought a few panels of these and have been very satisfied with the results. They arrived very well packaged in big cardboard boxes. They have really helped deaden the sound of my small studio. Not only were they effective but I also liked the look of the pyramid shapes, and they give a very professional look to the room.
I use these to cover all walls and the ceiling in my sound effects recording room. The entire room is built using double layer of plaster boards, 120mm glass wool insulation, 2 layers of sound blankets directly ontop of the glass wool and finally a layer of this 80mm pyramid foam which gives the room very little reverb and is dry and dead enough for my purposes.
I have put together a video that described the different layers of sound treatment and in the end there is a quick comparison for each layer that includes hand clap reflection test with visible waveforms: https://[LINK]
The foam was delivered in large cardboard boxes and I think I used 36 of them for my room. Most of them were in very good shape with the odd panel being slightly deformed during shipping.
Very good price performance in my opinion and I'm happy with my purchase.
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