Some musicians will tell you that multi-effects are for beginners.  While I used this many years ago, single pedals were not giving me the distortion and octave tones that this unit can manage, so I came back to the Boss ME-50B.  It has everything I need and a bunch of stuff I'll never use.  I loop it through a SansAmp VT Deluxe so I can cut the Boss and its "always-on EQ" when I don't need an effect.  If I could bypass the EQ, I would give it 5 stars.  There are quite a few demo videos on YouTube.  I suggest you watch some of them if you;re on the fence.  It's the best multi-effects unit for bass that I have ever used.