DSM & Humboldt Simplifier Bass Station (cool sounds but too complex, I don't understand, worth It?)
I love mine and I wouldn't say it's all that complex. Essentially, the right side is your amp, the left side is your cab sim and the two knobs in the middle are used to blend how much of each you want in your signal.
Admittedly, Idid use the parallel signal path and the two effects loops to wire mine up into an unnecessarily complex pedalboard.