I stayed at this hotel with my wife and our young children for 3 nights, during a visit to Athens (leisure). The hotel has an ideal location (Kolonaki, next to two metro stations, away from central streets), very spacious rooms 60m2 (bedroom, livingroom, kitchen and bath) and very good price (90 euros per night through booking.com).
There is also very fast WiFi.
There is no breakfast, however you have the kitchen and a supermarket next to the hotel.
The furniture and the equipment is quite old but functioning. The staff is very friendly, they resolve any problem with the equipment. The room is relatively clean.

The best thing about this hotel is the location. (I needed to be in Kolonaki).
The second best thing, is the location.
The third best thing, is the free wifi.
The apt itself is somewhat shabby, especially the living room with a very old TV that gives very limited and blurry reception. But if you do not intend to stay in the room a lot, (and you should not...there is too much to see), then I can say that it worked well for me. It was quiet and clean. The kitchen facilties were a bonus. The bathroom is nice and large and renovated. I would stay there again if I had to be in Kolonaki.

Stayed for two nights in a two bedroom suite. Rooms do look a bit jaded but that is okay. Basic services, and really tiny but adequately equipped kitchen. Friendly helpful staff more than make up for any minor inconveniences. They kept our extra bags for two days till we got back from Santorini (even though we were not going to stay with them). It is located in a quiet green area full of embassies. You can also climb Mount Lycabettus from from here. There are also a few museums nearby.The mini mart's just around the corner. All in all a good experience.

Effective air-con and excellent fast and free WiFi. Clean, adequate kitchen facilities. Polite, friendly and helpful staff. Mini-mart round the corner. Short walk to Evangelismos metro. Quiet area with lots of trees and roomy balcony from which to view them. Stayed for 5 nights. Pleasant area to walk around and walking distance to boutiques. Comfortable walk to
Syntagma through National Gardens.