I've owned two Dynarette cushions, a large and a small for almost 10 years. You can see the Dynarette in most of my YT videos (plus I have a Guitarlift) .The Large was my main one and it was holding on for dear life, being held together with green painters tape after a run in with my dog. I liked the idea of the leg strap on the Flanger Cushion and unlike the Dynarette, it was cheap enough to just give it a try. My first impression is that this is a major win. The leg strap is a game changer. I'm no longer having to keep the cushion balanced and in place just to keep the guitar stable. The strap keeps the cushion stable effortlessly without having to be particularly tight. It's also softer than the Dynarette which allows the guitar to sink a bit into the pad. That also helps with stability. I'm definitely pleased with this guitar support and I'll be using it with my archtop.