Good Points: strange sound, like a metalic harmonizer with a digital flanger on. you can't control the rate of the flange.
Bad Points: Not enough knobs.
Good Points: self-oscillation of odd tonal clinks & clanks makes it so you don't have to do as much to keep your pedal chain sound as if it's having a lot of variation.
Bad Points: the whirring back & forth is too predictable, gives too much of it's own structure to whatever you feed it.
Good Points: Get some nasty sounds.
Bad Points: Doesn't sound like a sitar at all.