You're definitely getting your money's worth at Vaki's place. She was very helpful and responded quickly to my messages. I was welcomed by one of the building's neighbours who showed me around the place and explained how everything worked, he even spoke some Spanish, he's a very nice and cool guy. The apartment is great, spacious and has everything you need. It's not exactly close to the center, but a 30 min walk gets you right at Syntagma square, and the metro will have you there in no time as well. The only thing that bothered me was how some of the other guests would leave food on the sink or hair on the tub, but that's not really Vaki's problem, more like other guests not knowing how to live on shared spaces. Overall I would recommend it 100%