Where do you run the MF in you chain?  I have found that having the MF in front of the amp and in front of any gains greatly enhances the filter-type effects.  Frankly, all of the filter-type effects sound wrong (to me) when in the fx loop or after the gains.  i couldn't dial anything in like I 'd hoped.  When I moved it, great sounds were behind every turn of the knob!  Of course, this is at the expense of some of the other effects like chorus, but I actually prefer the chorus in front of the gain rather than in the effects loop (plus I have a great chorus built into my amp if I get the itch).  Before I moved the pedal in my chain, I was about to go buy some other pedals because the MF just didn't sound right to me.  Good luck.