Despite some issues with communications over the access code and figuring out how to work the HVAC system, our stay was comfortable. The views of Acropolis were amazing, there is plenty of space, and the place was very clean.
I wold suggest paying attention on small maintenance issues. For example, the bedroom door would not stay open and the suitcase stand fell apart. These are small annoyances but can be easily taken care of. We will definitely try to come back, though.