While it's feature packed, those features are barely explained anywhere. I could tell you what I found out but then I would be doing their job for free. Rides in the storm seems to make great bang-for-your-buck modules, and in formats that make sense to me, but I fear one of the reasons they're so cheap is because they don't care to make proper manuals or respond to emails with questions...
I spoke to the owner at his stand at dutch modular fest and he did answer my questions then, so I can assure you he does really know what he's doing with these designs. They're behringer prices but with proper, thought out, original designs.
I'm still debating whether to go for the quad envelope generator, but I have no regrets buying this one.