Really good location!! Andreas was a wonderful host—very helpful! He spoke English very well. He arranged transportation from the airport (I had a problem because like so many people on my A. Canada flight—my luggage did not arrive— so it took very long at the service desk), had detergent for us to wash our clothes, showed us where nearby restaurants and a grocery store were, checked in with me during our stay, and even came to change a light bulb that was out. The apartment was clean, spacious, and as beautiful as the pictures! I was there with my husband and 3 children ages 16,19, and 21, so having three bathrooms was very nice.
Athens was having a heat wave while we were there, but the air conditioning in the apartment worked great. The one bedroom that didn’t have its own air conditioning (with two twin beds) still was comfortably cool as long as the bedroom door was open— no problems there.
As far as Athens goes, we really enjoyed a food tour and a morning guided tour of the Acropolis (before it got too hot), but thought our Delphi day trip wasn’t worth it—I’d rather have spent an extra night in Nafplio, or only gone to Delphi as a stop on our way to the monastery that’s a 4 hour ride away. Then we would’ve spent the night in the town with the monastery (and come back or gone straight to Nafplio the next day).
Also you can get to and from the airport on the metro for 9 Euros per person, and the apartment is an easy 5-7 minute walk from the Stygmata stop on the blue line.
If we were to return to Athens, we would definitely stay at this apartment again because of its location, comfort, and excellent hosts.