We had a great time at Angel and Ailbhe's. I'd also like to thank Anna, who was very helpful and available before and during our stay, we really appreciated that!
The flat is really spacious, with a lot of amenities, that made our stay perfect. In terms of location, it's a couple streets away from very nice restaurants and bars.
We also had breakfast and diner on the balcony with its nice view!
If you're looking for a place to explore Athens, that's a very good choice :)