It's evolving, but needs attention.
The fact that the vibrato doesn't work with the top boost or normal channel is such a shame.
The guitarist spends a lot of time fine tuning the core tone, using the gain structure and the EQ. Then, time to add Vibrato and, NO! it only works on a separate vibrato channel where you can't get the tone you've been working on prior to adding the effect.
Also, the vibrato channel not having any EQ possibility makes it so limited.
Also, going from LIVE to PRESET (and back) cuts off the signal as it loads the settings (as the computer inside it is "thinking" ) and it takes away from how useful it is to use live on a stage (or even recording a track for a whle song with different sections). It doesn't change smoothly from setting to setting.
So, folks, I suggest you bring your own tremolo and gain/EQ pedals if you want to make good use of it.
I own a real VOX and the vibrato does work as an added effect on whatever amp setting I'm using. If they're advertising it as "authentic" , that's the least it should do.