I don't have a bad thing to say about it. Delta and Makenzie targets are not the best for them, I've had problems with all arrow finishes in those targets. Rienhart and bag targets are no problem. Most of my shooting is with a judo head outside, or broadheads, and they stand up to LOTS of abuse. I don't shoot at targets often. I prefer to be hunting something with judo heads if it's not "regular" hunting season (September-January).
Like I said earlier, I can not say with intelligence how good Pro Fin is, because I have not used it. I can say that Parks is phanominal, and all I will use till they stop making it. I do not run it thru a gasket, so there is some lost in the drip tray, but most is allowed to run off the shaft till it starts to "Drip", then I hang to let finish dripping and dry.