There are 3 knobs on this unit. They are volume, tone, and sustain. it's very durable and can easily stand road wear. I keep most my pedal in a cushioned backpack and it has faired well. The footswitch works good and is true bypass so you don't lose any sound, which is an improvement of the big pi.

UTILIZATION

The volume gives a good boost to your sound and works nicely in combination with the other knobs. the tone control adds more highs as you crank it up. You can get a wide variety of sounds through this thing if you tweak it right. It's a very simple self explanitory pedal.

SOUND QUALITY

This pedal has the perfect sound for grunge. I use it to get my sound when we cover "crackerman" by stp. Check that out if you would like a good example of this pedal. You can also get hard rock sounds and things that sound smashing pumpkin-esque. I tend to keep the tone around 2 o' clock and the sustain around 12 o' clock. The sound does cut out a little at the top of the tone knob but nothing like the digitech grunge. Works great in combination with my crybaby wah pedal for killer leads

OVERALL OPINION

It's very versitle and a little under priced in my opinion( I really have never said that about a pedal before). I would buy it again in a heart beat. I prefer this pedal heavily over the digitech grunge pedal. The grunge pedal kept cutting my sound off when i turned the tone know past 9 o' clock. I really have been able to find some of my "own" sounds through this pedal