This is my second SynBad. I bought one right when they first came out on here, and have paired it against Tuxedos, Cashmeres, numerous 2-band and silvertip badgers, etc. Genuinely, this is the best shaving brush knot I have found by a long shot. It holds water and lather well, perfect backbone, and as soft as the Cashmere. At this point, unless AP shutters the business, I won't be using any other brush.
After a couple years I've worn my first one out, though most of the damage came from my toddlers getting hold of it and "shaving." Overall, it holds up very well.