Amazing stay in a spacious, homey, warm apartment in the heart of Athens's anarcho-punk Exarcheia neighbourhood, which is an easy walk to the main downtown areas around Syntagma, Monastiraki, Plaka, etc. But also the neighbourhood has its own very lively scene with patio restaurants and bars along many little alleys.
Co-host Dimitri (brother of Christos) was super welcoming and kind, inviting me to join him and his friends for dinner and drinks on consecutive days, helping me get some laundry done, and suggesting itineraries for seeing the city. The apartment is on the fifth floor - beware to those who don't like to climb stairs - but there is a small elevator. It is very well ventilated and despite the hot August temperatures, I didn't feel the need to use the AC at all.
My only, minor complaint: the location Airbnb gave me after I'd booked wasn't precise enough, and I ended up a block away from where the apartment is, but it was all sorted out with a quick call to Dimitri on WhatsApp.
Great value. Would most definitely stay again on a future trip to Athens.