I recently bought my new POD GO .I absolutely love it .I can say it is so close replication the Tube amp. When i compared with real tubeamp ,i noticed that there's a sustain issue while i was trying get a tone of GARY MOORE (Parisienne walkways) this works when i use pedal with 4cable method bypassing the tube amp ,which pod go cannot replicate in the PA(Direct). I hope there will be a firmware update to over come this issue.