Honestly mate, the one I owned, sired by taffy out of a mongrelly but very greyhoundy bitch, was my best catch dog. But the f****r did my head in VERY regularly. And the dogs I've seen, and I've seen several with beardie in, have been, like I said earlier, faaar too much headwork, from past up until fairly recently, roughly the last 3-4 years.
I will NEVER own another dog with beardie in it