Anyone try one? I'm in the market for an expression pedal, and I stumbled on one of these. The general shape is like a Crybaby wha pedal, and has jacks for both being a volume pedal, and a expression pedal jack. It seems to be right around the same price as the roland/boss stuff and i figured if i get 2 for one, why not? and rocktron seems to make some nice stuff.