Maria's apartment is perfect for a single person or a couple. The location could not be better - right by a metro, 20 minutes or less from the best bars & restaurants in Athens (including 2 blocks from Cantina Social, which became my go-to place). Because of it's proximity to other bars, it is a little loud at night. If you are a light sleeper, I suggest bringing earplugs (it did the job for me). The unit is on the 4th floor and so runs a little hot - I was in Athens during a heatwave and found that the AC was a little weak at times. The balcony is great though! A great place to hang out when it cools down at night :)
All in all, would recommend this airbnb! Great location, great value, easy check-in, and perfect as a place to have as a pit/rest stop as you explore Athens all day.