We stayed at Monica's place from June 9th until June 14th. Monica was very responsive and checked in to see when we landed to ensure someone would be there to meet us for check in and even gave us a few suggestions on the best way to get to the apartment from the airport.
Upon checking into the apartment, I noticed the bathroom smelled horrible but didn't think too much of it. We didn't stay too long and went exploring. After we got back, the bathroom still smelled and I noticed there were long dark hairs on the bathroom and bedroom floor. The bathroom smelled like sewage and was overwhelming. We had to open the bathroom window just to be able to be in there.
I messaged Monica on June 11th (we had waited hoping it would go away on its own) and told her the bathroom smelled like sewage and asked if we could use the other bathroom if there wouldn't be other guests staying. Monica asked where the smell was coming from, the toilet or the shower, and asked if we had tried opening the window. She said there were other guests coming so we couldn't use the other bathroom and she would come by the next day to check it out. She came by to check it out about 24 hours later and messaged me telling that it wasn't a sewage smell, it is from the humid air because no sunshine was entering the bathroom and that she changed the air freshener.
The smell was clearly from sewage and after more investigating, we believe it was coming up from the shower drain. We were able to get through the next couple days by covering the shower drain and leaving the bathroom window wide open. Very disappointed in the stay due to the smell and the cleanliness. The bedroom was also very small. This was a huge issue as we didn't spend too much time in the room, but two people with luggage had a hard time fitting in there and being able to move around.
The location was great though! We were right by metro and bus stops along with a lot of sites.