Klons!  For years these were THEE high demand overdrive pedal on the market, fetching hundreds of dollars to get on the year-plus waiting just to buy one, or going for even more on eBay.  Now that the manufacturer stopped making them (albeit temporarily) they can go for over a grand!  Holy crap.  People flip their shit for this pedal and rightfully so. Its a nicely built buffered overdrive, with a good tonestack in there, but where it differs from other pedals is its huge boost potential!  The thing has boost for days, which helps to drive your amp into its own distortion.  That coupled with the clipping-overdrive that the pedal produces and you get into some really sweet sound natural overdrive.

This is my take on the original unit.