ICA4+ with a Windows notebook and an iPad. When it works, it is wonderful.
During my last session I plugged the iPad in in mid-flight. Nothing. I reset the ICA4+ by unplugging the mains cable (is there a more elegant way to do it?).
Nothing worked after this but there was a loud high beep that wouldn't go away. I gave up.
At home a few days later: the beep was still there but after some replugging and rebooting, everything worked again.
I noticed however that the lightning cable to the iPad (that used to work both upside and downside) now only works in one direction - sometimes no ICA4 is recognized and the charging symbol doesn't show, then I need to unplug, turn it around, and plug it in, and then it usually works.
This is already my second lightning-2-ICA4 cable and it looks like I need another one. They are damn expensive!
All in all, I would love the ICA4 but it no longer feels reliable, I would not dare to use it on stage.