Giannis was very friendly and responsive even if we didn't get to meet him. The place is at a very good location for a visit of Athens by foot. The room was cosy and clean. The kitchen is minimalistic, don't expect doing any cooking there. The only downside is the noise coming day and night from the busy street and the AC in the room that can be a problem for light sleepers.
We have had a nice stay there and I recommend it. Bring earplugs if you are used to quiet nights.