…I haven’t, and love the fact that they are making rotary options at this price-point, but the consensus is that the sound is just… OK.
The main selling point for these mixers isn’t the knobs, it’s the circuitry and components, and you ain’t getting all that with Omnitronic. If it were me, I’d keep saving for the Mastersounds, said it many times, terrific bang-for-buck.