Dough came with the right pedal (vintage microtubes) at the right time. It was the first overdrive/distortion aimed specifically at bassists that did not completely suck at the time (I tried MANY throughout the nineties).
Then the B3K, B7K, Duality, A-O came. Besides the ADAM everything since has been variations of earlier creations with added speaker sim and presets.
For what you get, stuff is really overpriced but that goes for many many pedal manufacturers these days.
I own a Microtubes 500v2 amp and only use its VMT circuit to add a tiny bit of grit, not fullblown distortion as the Tech 21 YYZ does that job way better for what I need.
On the Quad Cortex I build bi-amp stacks to get my overdrive tone, which works very well.