Beautiful place in a great location! Grigoris' apartment is amazing. It's a perfect location to explore all the sights and neighborhoods of Athens. In the heart of Monastiraki, it's convenient to get to from the Airport via the metro and walking distance to everything you want to see. The apartment is on Ermou street so you need to be a little vigilant when walking around, but, all-in-all very safe.
The place itself is very clean and big and has great views of the Acropolis. Floor to ceiling windows cover one wall and create a scenic experience.
Grigoris was very communicative and met us at the metro station to take us to the apartment and explained everything. He also let us check in early. He's a great host and we would gladly stay again.