I bought one this week and agreed, it DOES sound good on bass
I only intended for it to be part of my guitar setup as I was trading my DS1 in but I figured I might as well pass my bass through it as well and see what it sounds like.
Insane amounts of gain, fatter wetter amounts of drive and presence compared to some actual dist /od pedals
Sounds cool
However you might want to put this one on a separate loop as there is no blend as OP rightly stated.
Cool!