Check-In was easy and worked as described.
The place however was not cleaned properly: Cutlery and pots were all used and crusted with food and left like this is the drawers (as there were no cleaning detergent or sponges, we also couldn't wash up..). On top of that, leftover spoiled pizza was still in the apartment. As a whole, the kitchen was in a very poor condition as the water boiler and coffee machine were both broken and thereby not usable.
Host (a company) offered a "re-cleaning" on the phone, which only happened more than 48hrs later - less than 24hrs before we were due to leave - and they didn't clean anything, but simply took the leftover food!
Additionally, it was possible to connect to the WiFi with the given password, however, it could not provide any internet connection (we tried with multiple devices) for the whole time of our stay.
Finally, the apartment is not the one advertised in the pictures (obv. less nice and not very comfy) - however, this was written in the listing and thereby okay.