I have a BM, and I use it in conjunction with a Boss OD3 or DS1. The key to the BM is the tone controls, particularly the low knob. which can provide tremendous bottom end "oomph" to the tone. With tones at centre, its an OK pedal but comes into its own when the tones are at around 3 o'clock or higher.
The BM is great on its own, but I find itreally shines ahead of a second OD, where the combination can produce some awesome tones. Try the BM on low gain but cranked tone controls, with a second OD set flat for tone, but higher gain. Very useful pedal, IMHO, and incidentally, built like a tank, - easily Boss standard in that respect.
Rick J