We found the apartment perfectly clean. It is spacious enough for a big group (we were 10) and smart priced. It is partially renovated (some travellers may find that there is still work to do) and nicely decorated, with new home appliances. The area where it is (close to Omonia sq) is heavily deteriorated, though quite convenient for visiting Athens monuments. This is nothing to blame on hosts, since you would find the same environment if you stay at one of the expensive hotels in that area.