We booked the apartment for business and it's location was supreme - 5 min walk to the Megaron Athens International Conference Centre and there are a couple of bistros on the way where we could grab breakfast. The apartment is modestly equipped, has a small kitchen (we didn't use it though) and 3 separate bedrooms, the beds were ok. At least my bedroom was a bit noisy, but it seems noise is a general feature of Athens. The apartment is completely air-conditioned. We were requested to turn off the electric boiler whenever we didn't need it, but it provides a sufficient amount of warm water in less that 15 min, so this was not a problem at all. We were also happy with the distance to the city centre (approx. half an hour walk).