I own a Mesa Mark V:35 and at home I could never use it at a volume higher than the lowest at which it would produce a sound. I needed some nice way to reduce the volume so I went looking for a solution.
Clearly the WAZA tube amp expander has two other competitors, the OX Box and the Captor X. After checking all the options around, the WAZA really surpases, to me, the competition given the nice sounds of their reverb (which replaced my pedal) and delay (which I don't really use) and the easier to operate sound than the OX.
It only loses a start in features for two reasons:
1. It requires a wired USB connection from my laptop
2. It would be really nice to have double microphone option in the cab simulator.