I'm a frequent business traveler who stayed in several apartments of Upstreet. They have high standards of quality, and this apartment was no exception. Conveniently located in Koukaki, at a walking distance from many nice bars and restaurants, and less than 15 minutes walk from the Acropolis and Plaka district.
The beds in both bedrooms were very comfortable. Perhaps there may be a little street sounds in the bedroom on the front. The other one is located on the backside and is completely quiet.
I can highly recommend it for a business visit or city trip. Or any of Upstreet's other apartments. I'll be back!