Having read a few reviews online before deciding on my purchase, I knew what I was getting myself into with the M288.
Many reviews and videos you can find online mention that the sound starts glitching in the lower registers which it does. Under some specific circumstances that is. Starting from the lower G (fret 3 on the lower E string) and lower, once you start playing longer notes and letting them ring, the pedal's tracking basically doesn't know what to do and just stops after a second or so. It is very clear and very consistent but definitely not a reason not to buy this amazing octaver. I mean, how often are you going to use an octaver to ring those low notes?
A bigger concern is if you're going in the higher registers (fret 14-15+ on the high C-string of a 6-string bass) things get pretty muddy unless you're muting your other strings very well. Any resonance or ringing will also mess up the tracking and create a messy sound all around.
I've also tried the pedal on my guitars and they don't have this problem, even on fret 20+ on the high E-string, everything sounds great. So it's really a "resonance and play properly"-kind of thing.
Having said that: the pedal sounds amazing! The controls couldn't be more straightforward and intuitive. The pedal is very well put together and made of durable materials. The mid-boost is pretty useful if you're lacking any sort of EQ or want to shape your sound somehow.
As long as you're aware of the aforementioned "shortcomings", this pedal is a solid 5/5 for me.
