I love my B7K, it's the only pedal that's been a constant on my board for the last few years. I've been through so many: VMT, Agro, Oxide, Duality,
It's a more versatile pedal than some people realize. I use it as an always-on pedal, but I don't really use it as a distortion, more of a clean tone-shaper. I think you have to be judicious with the blend control, as in general a little goes a long way with the very strongly voiced sound of the pedal. My basic settings:
blend: 9:00 level: 2:00 drive: 9:00
low: 2:00 treble: 10:00 lomids: 2:00 himids: 10:00
grunt: fat
This setting (for me) is wonderful and subtle. It just adds a focus and a bit of bite, just enough to make me pop in the mix. But from my bass I can still get anything from motown to bright aggressive pick tones. I could crank the drive and get more of that Nolly grind, but the music I play doesn't call for that. My sound is not audibly distorted (although it's in there), but if I turn off the B7K, everything sounds smaller, less punchy, and less lively.
One thing it doesn't do is get warm old-school tubey distortion. It does a punchy kinda-clean, and a modern metal drive, with a focus on the high mids.
The eq is voiced very high, what it calls "low mids" are "mids" to me, its "high mids" are my "treble", and so on.
And while it's not a very "warm" sounding pedal and doesn't really distort like tubes, my overall perception when you don't CRANK the controls is one of bigness and heft, with a glassiness in the highs. That is the same feeling I get from a nice low-gain tube amp.