While this is a "guitar" pedal, I've been using it with my 6-string bass in the FX loop of my amp. As a reverb, it has 4 or 5 variants, not to mention modulation effects like chorus, flerb (flanger), and octave. Setting the FX level low helps provide the subtle reverb effect typically used on guitars to add space. Setting the FX level high offers a lot of other-worldly sounds. The tremolo is also very slick, offering sine, triangle, and square LFO waves which vary the way the input volume changes from soft (sine) to dramatic (square). The guitar tone seems mostly uncolored for my bass with the FX tone control flat. Increasing or decreasing that control does provide reverbs that are dark and moody to bright and surf-y. I am a big fan of EHX pedals, and this one does not disappoint.
Long Island, NY