The location in Pagrati neighborhood is great, close enough to the center but have it's own unique vibes. Pagrati neighborhood is young, cultural and fun [and safe for a young girl to walk around in the nights].
The view from the rooftop is magnificent, at a nice weather it's the best to sit outside.
I had good time been in Ioannis's flat, great value for money, especially if you're having vaction by your own.
The only criticism I have is that It can be a little more alight inside during the nights and for extremly cold weather, it may be nice to have an extra heat unit.