This studio in Psirri was an excellent stay! It is small but cozy, everything is new and clean with a modern and sleek interiour design. The bed is exceptionally comfortable!
The informations for checking in were all straightforward and the studio was easy to find. The location is very, very central, all of the sights are easily reached on foot.
But it does indeed mean that it is a bit loud in the evening from the roof-top bar opposite of the window. We stayed here over a weekend in February and during that time it was enough to close the window to keep the noise out, so it really wasn't a problem (we are usually very sensitive to noise). It will probably be louder in the warmer time of the year, though.
Psirri is very lively, with tons of great cafés, bars, restaurants and whatnot to choose from - a great place to get to know Athens.
Communication was excellent as well, Stelios kept in tough throughout and responded quickly.
This place is great value for the money and highly recommended!