Only good experiences with GIK. Shipping has gone up for everyone. Last time I ordered was previous to the supply chain issues and I had to wait a couple of months. I made many of my panels, but utilized GIK for the low frequency absorption such as bass traps. For the DIY panels I ordered the Guilford of Maine material from GIK as they had the lowest prices. The design of wood covering over the acoustic material is lovely. I was going to move some from the home theater room to my two channel room, but my spouse protested as she likes the way they look.