Bought this specific unit back in 2010 and has lasted me ever since. One of the most engaging & characterful filters on the market to this day. The crossfader and variety of CV options makes it a very dynamic and flexible filter than can double as a mixer and utilize a number of outputs for different routing options. There are two jumpers on the back to set the character of the filter in either "Modern" or "Vintage", vintage being a filter variant with more drive introduced in the resonance circuit. This unit is currently set to Modern for a cleaner more surgical sound.
This has been one of my favorite units for a long time and only changing it out for case space. Average rack rash for a module its age, looking for a good home!