This isn't my picture, but they all look the same.
I've only had a play with it at home volumes, but it sounds great.
Anyway - it strikes me as one of the most well thought out bass drive pedals.
Whether or not you're a fan of Muff tone the features are great.
Input gain switch to cater for hot signals (0 or -10db)
All the obvious controls in place (volume that can go above unity, tone, distortion which is called sustain on a muff, blend - which is missing on the regular BBM)
Inbuilt gate - seems ok, not really tested it much.
Direct out (so you can split signal)
DI output (XLR)
But the best feature by far is the footswitchable crossover. Has a HPF for the distortion and an LPF for the clean signal... all bass distortion pedals should have one of these IMO.
The only way it could be improved is if the crossover had its own volume.
It sounds good for guitar too but seems much more tame and smooth than I remember the Big Muff Pi Tone Wicker sounding.
Comments
It also comes in useful if you want to run the tone control low but don't want the bass boost that comes with that - you can have the smoother top end but then cut some low out of it using the filter.