I've liked the response of this respective Vocoder on my effects experience for voice modulation and filtering. It's very vintage and recursive, principally for the robotic responses it engage. I feeled only some about the tempo on some frequencies it costs to sink in some melodies in different lateness.
But it atoms vintage, still being digitalest and are very responsive in effect. I had not experienced all plug-ins from Prosoniq, but this one is deep and great.
The price make-me think about something more reliable, but it's something to be.