The German magazine Keyboards has reviewed the Korg Konnect now.
https://www.keyboards.de/equipment/namm-2018-korg-konnect-mobiles-stereo-pa-system/
The full review is only available when buying the printed magazine. But the summary says everything positive (balanced sound, strong wattage) except that feedback suppression could be better.
At Musicstore Cologne and Dutch "Bax" the price has dropped from 499 to 386 Euros, so I'm on the fence of trying it out.