I have one. It’s a really nice knot. Not as soft as high mountain whites that I’ve used. Has a fair amount of backbone. Not as dense as their SHD 2 bands.
I have one of the Maggard Super High Density knots, Although they list it as a two-band, it is one of the softest knots I own. The tips gel in use. I just wish I had purchased a smaller brush.. I got a 28mm knot and it is a real lather hog. A 24 mm might be perfect.