We are a family of 3, with a 6-year old son. Here's our experience:
Pros:
Communication with the host is great and fast! He had prepared a very detailed guide with directions of how to get to the place, how to enter and what to do inside, list with local attractions, stores and restaurants, even an everyday route to Acropolis and other landmarks that would guide us through the nicer parts of the close neighbourhood. We didn't have any difficulties with anything and Sokol was always online to help.
The appartment is very cosy, clean, quiet and modern and offers everything you may need. The building is new and the terrace is great with a great view to the Acropolis. We even had the opportunity to cook because we didn't want to go out at the evenings. It has a central heating and is overall very warm (we visited in January). Great value for the prise.
Location: it's really close to city center, 10 mins away from metro station and Monastiraki sq., 15 minutes away from Acropolis and all the the landmarks, 20 mins from Syntagma sq. etc. We like to visit museums and landmarks and we had no trouble walking to all we had planned.
Cons:
While the location overall is great, the close neighbourhood is a bit shady, as there are a lot of wholesale stores and shops that - while hosted by very friendly people - attract a lot of immigrants and you feel more like you are in the Middle East, than in Europe. If that is not bothering you, it's ok, the nice and picturesque streets of Athens you expect to see are only 100 meters away, anyway. Either way it's a good idea to follow the route Sokol offered to get to the center (by the park and then around the parking lot), because if you step away, you may meet junkies or other unpleasant views. We chose to not go out with the kid after the sun sets.
The stores of the close proximity offer only middle-eastern goods we are not accomodated to, so we had buy food or drinks from supermarkets further away or when we got back from our tourist walks. That's not a big issue, as the closest big supermarkets are some 600 meters away in both directions and there are a lot of bakeries along the way.
Overall: We enjoyed our stay, didn't lack anything and we felt comfortable. As for the surroundings, that's not something the host can have control on and besides he made the effort to walk us through, so while it had an impact on the overall experience - it's not affecting the rating much. 4,9 from 5 stars from us. Thank you for the hospitality!