I just finished foolin' around with a Mad Professor Sweet Honey when I logged in and saw this post and thought it too much coincidence to not make a comment... The SWOD is the by far the most sensitive OD I've ever tried (but there are a lot of OD pedals I haven't tried...) and the OD can be quite subtle - or not, with a second OD in series. I'm not sure yet I could recommend it for bass on it's own OD merit (although as a mids boost I think it would be interesting) but I'm having a blast running it into a VT Bass. The SWOD easily shines on guitar (at least by a test using a PRS McCarty into a Mesa) but it is a bit more challenging to figure out for bass. This pedal is very input sensitive from based on what I've tried so far... And, there are particular configurations with the VT bass that are really killer.