Monika's house was absolutely convenient for my needs. In one of my most favorite areas from the past, Kypseli. For which I believe it will again become a place to be.
Especially, if you are a theater fan, you will find just at your door three stages for Greek commercial theater. If you like to attend Greek not so conventional theater too, you're lucky, again plenty of artistic theaters are in the area.
Of course, it's a downtown area so you can move by bus or trolley to other beautiful areas of Athens center.
I totally recommend it, Monika and Panos are very cool hosts and I absolutely enjoyed my short-period stay. ;-)