Right in the heart of Monastiraki, where everything is happening. You could not ask for a better location, especially when it comes to public transport, walking to the Acropolis and Ancient Agora. A good choice of restaurants and rooftop bars nearby too. George and Michaelis were great hosts, especially when we had questions for them, they answered very quickly.
The studio itself also has a great deal of space, so definitely great for small groups, and there is also a sofa to sleep on, for groups of 3 or 4. Only one thing for people to remember is that the hot water situation is different. You will have to use the switch, and it runs for about 30 minutes after waiting for about 15 minutes for it to work.
Overall, highly recommend this stay. Excellent value for money in Monastiraki.