I originally got this module to replace a Make Noise Maths, but they end up complementing each other so well they I kept both. Falistri does have more EOR/EOC outputs than Maths, more independent control over the shape and time of the rise/fall phases, a weird "quadrature" mode, and a ring modulator, voltage divider, and dedicated slew circuit (that Maths lacks) that end up in almost every patch. On the other hand, Maths' mixing and summing features come in handy often.
My one con is that the envelopes Falistri generates are sometimes a little too aggressive for my VCAs, leading to some clipping (Maths doesn't have this issue). Otherwise a very beautiful and functional module.