Great value for Athens. Checking in was easy: they send very detailed instructions. I was only spending a night between flights and traveling with a backpack, but it was easy to get off at Monastiraki, wander around the Acropolis at sunset, and get into the apartment in under an hour (the Acropolis stop is a minute away if you want the direct route). There are plenty off good local places to eat (e.g. Syggrou-Fix area) where actual Athenians dine. The walk to Syntagma station to catch the metro to the airport is a 15 minute walk if don't want to change lines.
The internet was speedy and the nespresso machine with pods was a fine touch when I had an early wake up.