No , but I have some brass shells from Kind Design: the See/Hear/Speak No Evil Monkey Shells, and yes, there is a certain amount of control with brass because of the weight. Would I use them for routines? Not sure; they're more of a collector's item. None of the specialty shells are cheap, and I would hate to have one "wander off" while in use. Will a fancy shell add any value to a good three-shell routine? I kind of doubt it.
In another vein, I also have "3-Poo Monte", where the shells are plastic Emoji-Poos, and people DO find those funny.