As a bass player I really love my MOD, but it was kind of a long way to find out how to set everything up for my needs.
I nearly always add a mixer pedal after every effect-stage to mix the dry signal with the affected signal to keep the bass punchy. And I use the tiny amplifiers a lot to obtain the right amount of gain for the different effects.
But after you found your stile you can do a lot of super nice things with the MOD.
For me it replaced my ElectroHarmonix POG, my self built CaveDweller Delay, my EBS UniChorus, and I use many of the distortion effects.
I espacially like all the time-based effects on the MOD. They sound really awesome!
What it didn't replace is my SansAmp VT-Bass preamp and my EBS MultiComp.
Apart from Brummers VoxBass Preamp theres bassically no dedicated preamp for bass, and I wasn't able to recreate the MultiComp with the provided compressors, but thats maybe possible if you dig deep enough into it.
So in summary I really recommend this pedal, but be prepared that it takes some time to get used to it!
I've read this moment theres a SVT plugin made by brummer in the unstabe section, so thats an additional nice bass preamp to try.