I booked this place a couple of days before my trip. Hours after booking I realised my end date was wrong. I asked immediately for a change and was then denied 3 days later after the trip had started with the reason the trip had already started and when I pointed out I requested before the trip, I was denied with T&Cs that changes had to be made 5 days before the commencement of the trip. I find this really inflexible. You're dealing with a corporation, rentals from individuals tend to be more sympathetic in my experience.
Already mentioned is the electronic lock. We were sightseeing and my phone ran down to 10% so I had to switch it off for the rest of the day so I could get into the apartment. This is crazy.
The apartment is nice and in a lovely neighbourhood.