Location is everything here. Apart from arriving from the airport, we never had to use public transport again. Nice neighbourhood, safe, plenty of coffeeshops and restaurants. Also Lida was great and friendly, gave us useful tips.
The place is not that confortable: very tiny bathroom, old plumbing, squicky floors, you have to wait for 15 minutes for hot water, almost no natural light. But is was cheap and had all amenities that we needed. Also quite stylish and artsy, with lots of books and prints on the walls. It's great for a low cost stay in the center of Athens.