Really interesting space! It is definitely small, but do not let that stop you from booking this place. The host has clearly put a lot of thought into everything about the apartment, and it feels much bigger. The bed is comfortable and expands to become a full double bed. The view of the Acropolis is amazing and a nice view while working from the desk. The hosts gave great local tips and even provided some fresh fruit, coffee, bread, etc...
As great as the apartment is, the location might be even better! You are right in the middle of the action, and nearly everything is walking distance. If it isn't, you are a 2 minute walk from one of the main subway stations.
Highly recommend!