I’ve tried it and find it to be a great tool. I’ve also made a version of my own, and once I noticed the benefits of it, I purchased one.
It’s had some great results with some of my younger students, too. With students that had a pronounced overbite, it relieved the pressure on their top lip and immediately helped create a better sound.
To relate it to Windworks, at least for me, I found it helped move my lower jaw a little forward. This made it easier for me to understand the ahhh-ooo embouchure.
But it can be used as a “buzzing/strength” tool which goes against the Windworks philosophy of relaxation and letting go.