I initially got this in my very early naïve days, thinking it would allow me to circumvent having a bass guitar, or otherwise help me achieve otherworldly heavy tones.
Within this context, it will add a bit of heaviness with the 1st octave down, and a slight amount of wet signal, however anything beyond that (any additional wet signal, or venturing into the 2nd octave), the sound just becomes muddy and I personally could not find any use for it.
However, the construction is solid, built like a tank, as are all TC Electronic pedals in this range, and it does exactly what it claims to do, and I know that some people use this for other applications (synth) with much success.