I only 'owned' this thing for about a year back in about 2001-2002 (I had borrowed it from a friend and 'forgotten' to return it until he gave a little hurry up one day, hehehe) ... back then I was basically playing through a stock Squier Affinity Strat and clean 20 watt practice amp. Now, I was pretty much just an intermediate player back then, but I could tell this thing was good. Really nice fat sounds, possible to get some really tasty fuzziness (not buzz, but fuzz) when cranking the gain. Always nice to have the extra tone knob for customising your sound, too.
Reliability/Durability:
Only problem was that the pedal had taken a beating, so occasionally there was some hiss; but tapping the edge of the footswitch near the jack always fixed this up in a second. Generally DOD things aren't super reliable, but apart from the aforementioned problem (due mainly to misuse and carelessness), there were no problems whatsoever; even the crappy battery cover held up perfectly. However, as I was using a severly second-hand (possibly third- or fourth-hand) model, I won't rate it.
Ease of Use:
Very simple ... 4 knobs ... hard to get a genuinely crap sound from this thing ...
Customer Support:
Overall Rating:
At the time I had been playing for about 2 years, maybe less ... mostly a mix of punk/alternative rock back then ... this thing could do subtle tube overdrive to cranked 'overdrive-distortion' ... I remember once playing a gig with this thing between an Epiphone SG and a Marshall JMP stack; it just roared! I've been eyeing a DOD FX-51 'Juice Box' in my guitar tech's display case ... I would love to try that out in combination with the FX-100 ... but I haven't seen one since I was forced to return it to it's rightful owner ... *sigh* ... anyways, it's a really good pedal - if you do see one, try it out. I honestly can't understand why DOD discontinued good pedals like this one and the 'Juice Box' ...