Does anyone else have issues with GiK build quality?

[slowGEEZR]

I have nine GIK products. One of the wall panels started showing a spot after a few months. I took it apart and the absorbing material had grease on it, which had bled through the fabric. I called GIK and they sent me some material to use to recover the panel, but it was a different material, even though I had told them what the original material was. Anyway, I eventually added a bunch of diffusers and decided to recover all of the GIK stuff with the same material as the diffusers.