First, the positives:
Regarding the location and the size of the flat, the price was pretty good.
Location is right in the city center, perfect for shopping & sightseeing.
Communication was straight forward and very quick. Check-In worked as described, no problems here.
Negatives:
There are things missing in the kitchen which could be added very easily (bowls, one sharp knife,..) and could make the stay way more easy.
There is a balcony, but there were no handles,which made it impossible to use.
There are several doors which can't be closed or are super difficult to open again. (One of us got locked in)
The flat was not clean, there was hairs and dust all over the floor and stains.
In one of the showers,there was a big whole in the ceiling, which should be renovated asap.
Beds were uncomfy, one of the extra beds had stains on the mattress.
The AC was super loud and annoying, starting in the middle of the night without being turned on, impossible to sleep. Ventilation in the bathrooms couldn't be turned off, which in combination with the unclosable doors created a noise disaster at night.
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In conclusion, flat is ok, but should be renovated and maintained better.