i have one and love it. i, too, use the envelopes for shaping, but also in conjunction with the spectral gate. the pitch shifting and filter are the main reasons i got it, and i use those a lot... i haven't really tried the foot pedal modes, just 'cos i'm not a foot pedal user really.
it's a great pedal that has a lot of different features in it.. expensive, but worth it for the variety.. it's a real workhorse.