Marios was a great host, great communication, he gave us great tips for going around Athens and he was easily reachable.
The location of the apartment is also great, it has lots of great things around, shops, markets, restaurants.
The only thing we had an issue with are cockroaches. I understand the building is old and the apartment is the centre of Athens, which definitely doesn't help with those monsters. But it wasn't pleasant at all seeing them around the kitchen, kitchen sink and bathroom, especially during the night. Also, considering it's in the city centre, it was noisy early in the morning and in the nights - but that was somehow expected considering the location.