Let me start by saying that I'm uncomfortable dinging a host, but I am aware that AirBnB does not work if people aren't honest about their experiences.
I'll add that I reserve a one or two-star rating only for a bad experience with either the host or security.
Neither of those things applied here.
The apartment looks exactly as advertised, and is in a wonderful location where we felt very safe. The building itself, as well as the apartment, are very secure, and our experiences with the team running the apartment were pleasant and timely.
Having said those things, upon arriving and taking our first shower, there was a terrible and on-going smell of mildew which seemed to be coming either from the shower fan or the drain. The odor was strong enough that it permeated the bedroom, and we were forced to keep the bathroom windows opened and the bathroom door shut at all times so we weren't living in the bedroom with the odor. I eventually abandoned this bathroom altogether and used the upstairs bathroom instead.
This was the main issue with this location. However, there were numerous other less important issues. One was that the N'espresso coffee machine did not work. Another was that the furniture itself on the two terraces was not particularly comfortable. In fact, while the apartment has a fun rock 'n roll aesthetic, the furniture in general was not terribly comfortable.
On the main terrace, there are some floorboards which don't seem to be anchored securely any longer and when you step on them, they bend enough under your foot that I gasped when I first did it, thinking the boards were giving way.
Most of the smaller issues we encountered potentially could have been dealt with by the host's team while we were there, but we were uncomfortable with the idea of people coming into the apartment to fix things while we were out when our passports and other things were there. Consequently, we did not let the team/host know about these things while we were on site in the apartment.