I got one off the Piper - must...resist...obvious...pun - the other week for my Angel and shot it at training. Have to say I was most impressed. Shoot-through was perhaps the most stand out feature and you get a good selection of different bore back ends.
There were other things as well, although they could be put down to a number of different factors. However, I was getting consistent shots all day.
oh, and they sure are preeeeeeettty