Spent two nights in January here. Host are very hospital, there were tasty homemade sweets, also she helps us with a place to eat and this restaraunt was very-very good. All communication was in a chat, the host answered fast. We had a problem with heating at first night, and next day the host came with a tecnician and fix it.
Flat is very large, cozy and stylish. There is a small cinema-room with cozy sofa and big TV with youtube. Kitchen is well equiped, one could find some food on a breakfast prepared by the host.
Location is good if one is going to have a bus to Sunion or visit the Archeological Museum. In any other case its not perfect. It's about 10 mins to metro and far from Acropolis (~30 mins walking). One should go by pretty unpleasant streets to reach those.
Central heating is not working, there is only air condition system. It worked bad on our first night (we slept under 3 blankets!), but after fixing it worked much better.