We really enjoyed our stay at Nikos. The apartment was well equipped and very good position for all types of public transport (we used the trolley buses 1, 5 and 15 a lot) and walking distance to the main archeological sites. There are nice restaurants and cafes on leafy squares a few metres either side of the apartment.
The only drawback is the traffic noise if you have the windows open but there is airconditioning in the lounge and several fans to circulate the air.
We highly recommend Niko's place for a comfortable stay.