Wow, this is actually pretty cool.
[VIDEO]http://www.youtube.com/watch?v=f_2EmtUzRu8]Digitech HM2 HarmonyMan Intelligent Pitch Shifter - YouTube[/VIDEO]
That does look like a cool pedal but a little limited in terms of features. I owned an Eventide Pitchfactor and absolutely loved it. It's more money but definitely worth it in my opinion. The ONLY reason I got rid of it was because I bought an Axe Fx Ultra.
Eventide PitchFactor Stomp Box - YouTube