Really glad I bought this pedal. Besides using it for vocals, I have played about with acoustic guitar, shaker and cahone. 
It's really effective and simple. I am a totally technophobe, so if I can do it, anyone can! I took it to an open mic last night, and everybody wanted to have a go! Highly recommended. 
I'm buying the Seinnheiser E 835 mic with the magic button next so I can work it from the mic. Perfect for when I'm in heels!! 
On a side note, my drummer not only stepped on it but spilt his pint on it, and it was totally fine!