It's freaking great!
The only thing I wish it had was more output from the VCA when it's mounted in a eurorack case, it's noticeably quieter than a standard eurorack module.
That being said, this machine is incredibly deep. It took a while for me to grok how to get it to play nice with other modules playing at a fixed pitch reference. What I've discovered (it's actually in the manual, but it could be explained better) is that depending on where you have the main oscillator and quantizer set, the sequencers then produce notes in a scale with the oscillator as the root note. So, if you have the quantizer set to 8ET, the pitches available on the oscillator will be the 8 pitches of the C major scale. If you were to choose, say, E as the pitch of the oscillator, now the sequencer will produce pitches in the E Major scale. It's a very easy and handy way to get the Subharmonicon to produce pitches in key with your other modules and modulating is as simple as turning the VCOs to a new pitch. It also makes it possible to set up the VCOs to play complimentary or totally different keys or modes depending on what you are going for.
