Yes, having huge trouble with it. With Local Off and connected to Logic Pro X on any MIDI channel I cannot get it to behave in the same way as any of my other synths. I'm alright only as long as I transmit or receive *only*. I can't leave both input and output connected such that it can be selected when the track is selected as with any other synth (Sub 37, Prologue, Behringer Model D).
My biggest issue is when changing presets with the knob; a huge number of CC messages is sent when this happens, and these seem immediately to feed back unless Knob Send CC is OFF. Once they have done so the synth is frequently left in an unresponsive state or a state where response to MIDI notes has massive lag.
I'm keeping it because as a polyphonic AT keyboard it's quite nice and quite fast, but its MIDI implementation is frustrating and all but unusable for me right now. I hope Arturia release a fix. It would be lovely to hear that they're working on new firmware, but every company is of course usually absolutely silent on these matters these days.