My two friends and I absolutely, ABSOLUTELY loved staying at Thelma's apartment for the two days we were in Athens. We had a late night flight and got to Thelma's place past midnight and yet she was there to meet and greet us, patient and gracious host that she is. It's also close to the metro, which made going around the city very convenient and accessible. Thelma also had a bunch of information ready (sites to see, getting around, etc.) and expressly told us to text/call her if we need any other info.
Did I mention how cute her apartment is decorated? Because it is and will definitely recommend her apartment to anyone looking for a place to stay in Athens. Thelma's casavathel is very much worth the bang for your buck!