I had a Source Audio Soundblox 2 Multiwave Bass Distortion a couple of years ago and I sold it to get other stuff.
Recently I bought back this pedal and let me tell you that I'm loving it more now than I did before. It's really an unique pedal and just the most awesome for synth bass sound. Some pedals get that same fuzzy envelope register but none covers all the ground that this one does. I just kept playing with it for hours last night.
Now I only need an Envelope Filter in the Pedal One series format.