The appartment is cozy, comfortable and functional, wich for us was perfect!
Location: GREAT! you are 30 min walking to Akropoli, about 15-20 min to Monastiraki, and Syntagma. Location is one of the best features to remark. ADVICE: walk around the area first as you've got plenty of good restaurants, cafes and shops very near (no need to go to city center for everything).
Home: it is located in a basement, if you don't mind that, it is a very good accomodation for a very fair price. It has everything you need with some little **exceptions. TV is amazing, bed is comfortable (top bed is better), microwave, kitchen is very nice...
** Dishes were not clean when we arrived, tomato sauce was sticked into dishes in the kitchen shelf so we decided to clean all again (having to work when you arrive on holiday is not what you expect but if you don't mind, it's ok). Top bed was not done and we were friends travelling, although I requested linen and they made an effort to bring it to me in bank holiday, I had to sleep with a bed cover, no duvet so we had to turn on the heater constantly (top bed was better, though).
Communication is not perfect, I think it can be improved by 2 factors, first the Airbnb page was a bit confusing and I didn't find how to enter to the appartment at first place, so I contacted the agency which responded just a while before our arrival to the apparment (I wrote them from Spain and the day before and got all answers when I was in front of the appartments door).
Appart from these little things, our stay was amazing and I would repeat no doubt!
I cannot put 5* but for me is a 4.5* accomodation, it is cheap, pretty, comfortable, quiet and very functional. Totally recommend it!