We're not aware of any noise problems. Obviously a hardware fault could cause noise, but such things are pretty rare.
Our experience is that noise is usually caused by one of the following:
1) mis-setting of the guitar/line gain switches
2) bad cables
3) ground loops
4) bad gain settings (guitar turned down, amp turned up)
But, if you are convinced it is the pedal (try it with just guitar-pedal-amp, nothing else connected), contact email@example.com