All user reviews of 4/5 for the MXR M77 Custom Badass Modified O.D.

Already said. The bass control is active, passive tone and switch "Bump" adds 6db in the bass and midrange.
Color classy and very good finish.

UTILIZATION

This is clearly an overdrive, with a maximum rate of gain fairly low. Reserve volume, however, is quite important. A 0 gain, the sound is not completely clean.
The knobs do not offer much resistance and disrupt easily. Volume settings and 100Hz are particularly sensitive.

SOUND QUALITY

This pedal has a very personal tone color, a lot of grain but different like TS. It produces few acute, which gives an impression of dynamic a little behind on clean sounds. This is far from anemic though and the sound is very warm, but it is difficult to get a super slamming her (with a TV maybe, but I'm allergic to TV, not type).
In boost channel saturated however, it adds a rough side beautifully. It can give personality to an amp a little smoother.
The Eq staging a musical. The "Bump" adds a nice sitting in a mix. The 100Hz is very effective off the tapestry will sound muddy but if abused. A set with subtlety.

OVERALL OPINION

I tested cars distos and OD. This I immediately looked very attractive with its staff and its grain bass response. This is a pedal to try before you buy because I think it may not appeal to everyone, because of its originality.
A little more potato would have been welcome to make the ultimate weapon, but it has that little something that makes it so attractive.
I care.