Let me begin by stating that this is a very difficult review for me to write. I have used Airbnb for more than a decade on three separate continents, and I have nearly always had a positive experience (and always received positive reviews as a guest, which you can check in my profile). However, my stay at this apartment was not pleasant. While Mario (who helped with the check-in and check-out, as well as an issue during our stay) was extremely courteous and helpful, and Andrei and Alina (who were available via phone and messages) were quick to respond and seemingly concerned with our issues, our stay was greatly disrupted by construction work on the building.
For 6 days per week, my wife and I were woken up by a team of construction workers who spent the entire day (with the exception of a brief lunch break) banging and scraping the side of the building (many days directly outside of our windows and walls). I am not exaggerating: the noise was so loud that we could hear it in every room of the apartment, even when we worked on our computers with our headphones on (which was particularly disruptive because we had virtual meetings and deadlines); the type of work was so intense that small pieces of the ceiling and walls were falling off onto the counters and floor in the kitchen; the workers spent long periods of time outside of the windows, so we also had to keep our shutters closed for privacy (which was particularly unpleasant because the apartment is already quite dark).
During our first few days at the apartment, my wife and I saw signs in the building (in the lobby and on the elevator) communicating to tenants that the locks on the front door downstairs would be changed, and that there would also be construction work in the building. We saw this and took note: contact Andrei, Alina, and Mario for the new key; prepare for some noise. On the first few days of construction, the workers asked to come into our apartment to clean up the mess they made on our balcony, so we contacted the construction company directly (the phone number was on the notices in the lobby and elevator) to ensure that these workers were who they said they were, and they told us that they were indeed with their company, and that the signs communicating the work being done had been posted more than 2 weeks before the first day of construction began. When I contacted Andrei and Alina, they said that the owner was not aware of the work and that they would allow us to cancel the rest of our reservation and provide a refund. Unfortunately, since we were visiting a foreign country and had made our reservation in advance, it was neither easy nor affordable to find and book a new place (in other words, there were few options for exorbitant prices). In the end, Andrei and Alina offered us a 100€ refund, as well as a refund for the last night, as we left early to check in to our next rental. I accepted both, but was greatly disappointed, as we basically were living and working in the middle of a construction site (the apartment has "Cozy & Quiet" in the name, and these qualities were emphasized throughout the listing, even though the walls are thin and we heard our neighbors often—which I usually don't care about, but the fact that the property is described as "Cozy & Quiet" and you have to sign a contract stating that you won't make noise was extremely frustrating).
Construction work aside, the property could use some maintenance—the drains clogged easily, the marble on the kitchen counter was falling apart, the blinds were ripped and torn in places, etc.
In a nutshell: Mario, Andrei, and Alina were prompt to respond and helpful with smaller issues; however, the construction work, the state of the apartment, and the owner's refusal to issue a retroactive discount were extremely disruptive, very disappointing, and unprofessional, respectively—especially for the price.