The tc electronic mojomojo is a quality piece of gear. Its operation is pretty straightforward, and it's easy to dial in a good sound. There's plenty of features that make this OD stand out of the crowd, mainly the two band active eq and the voice switch.
The overdrive is not a tube screamer like overdrive. It's warmer and not as tight. Therefore i find it difficult to use as a clean/mid boost for an already saturated amp. It works with the treble dimed and the bass dropped, but this pedal really stands out with its overdrive through a clean amp. It has a nice tube-like feel and can get pretty gainy even, though no heavy distortion.
I also use this with my bass, which sounds amazing. On bass it grinds without being fuzzy (though sounds like a fuzz when the gain is dimed). The bass knob really lets the bass keep its low end which a lot of overdrives fail to do.
The pedal is built like a tank (like many others already mentioned).
Overall this is an awesome pedal, especially now that it's only 50 bucks. It's a great overdrive that works well with bass too.