Great addition to any intellijel case.
You're getting 4 attenuvertors, or a 4 channel mixer, and loads of things in between. Handles audio and CV just fine, and with the way the outputs work you can do 2+2 or 1+3 patches.
I'm finding myself frequently using it as an extra buffered mult, as well as to mix oscillator outs and adding some extra shaping to an envelope by adding an LFO or other envelope to it.