I have bought it as a base layer of my bass tone. The compressor side is okay, if a little noisy to my ears.
The octaver though is only usable when dialled way down as a very subtle sub-octave. Even then I felt like it was just muddying my tone instead of giving it more substance. As for using the octaver when playing in upper registers, it’s not usable for me at all as it’s not tracking well enough.
In the end I’m using only the compressor side.