Very clean sounding jup8 style filter, times two. The only real negative is that the input levels are low biased, it takes effort to overdrive this thing, and consequently for this filter topology in general if you increase resonance the output level tends to lower significantly. That said, I love it, 3 sig inputs with attenuation, 3 control inputs with attenuation. 2 outputs. Yesss! Long time ago I found a system 100 samplepack and mesmerized by the sweet, pristine, deep and liquid cutting nature of this filter. So yeah this thing does not dissappoint, even if it contained one filter its worth the money, but hey you get two. Selfoscillation occurs kind of abruptly but I don't mind. The selfoscilation is always very controlled and sweet. The whole ergonomics is very natural, compact and to the point, as in a total joy to use. As it's all surface mounted so modding seems unappealing although I might get into bypassing some input resistors to crank up the gain.