Katerina's place is beautiful, very cosy, perfectly located for all the main sights in Athens, and very close to the metro. It's full of small little touches that make it feel homely. The kitchen was well stocked and there's a handy guide to local places to check out.
The area is full of smaller restaurants and bars and within walking distance of the Acropolis and the metro - which I appreciated. I didn't actually use the metro that much as most of the places I wanted to go to were close by.
I would not hesitate to recommend Katerina's place if you're looking for somewhere central to stay in Athens!