Actually Murkrow sounds like the best user of Quash for general teams (Kingdra is only good in rain). Can't believe I never thought of it before. I have a dream world Murkrow in my PC somewhere so I too might try it sometime.
Too bad the move has such poor distribution because it has good potential. To me it seems that the only things that learn it that can actually use it effectively are Murkrow, Kingdra (in rain) and maybe Raikou because of its base 115 speed.