The first apartment we arrived at had a horrible smell. We informed the host and he/she promptly responded and moved us to another apartment upstairs. We were glad. The host was very helpful as well by calling us a taxi for the departure day as we requested.
The one bad thing was that on the last night there, the adjacent neighbor/guest and the family was extremely loud at 0300 in the morning. We knocked on their door to ask them to keep it quieter as we need to sleep before heading to the airport. We informed the host as well. We were very annoyed that these guests have no respect for others around them.