Company is working on getting the Master volume to be smoother, i agree that just on 1-2 the amp gets loud. The Dual Mod version of the Mzero gives more control overall, but again, better Master volume sensitivity on it's way. The posts describe the amp well, i myself use the Ch1 a lot, because i can get a lot of different gain settings from it, between using the guitar volume knob and a boost/overdrive or distortion pedal in front. With the gain at 5-6 in Ch 1, the amp stays mid-clean at full volume, cleans up turning down the guitar volume, and roars with full guitar volume and a pedal in front. If you turn the gain all the way up ( Ch1 ) the amp has a natural distortion that covers a lot of ground. Ch2, the way i use it is...set it and forget it! Find the right amount of gain for full aggressive leads and use the guitar volume for anything in between. The difference here is the extra tube gain and compression you get from it, makes playing smooth, dive bomb and harmonics galore.