Stayed here for three nights last month. I was expecting the worst after reading this thread but in the end it wasn’t that bad. However, it was also not great and it’s probably one or the worst Grand Hyatt I have stayed so far. We got an upgrade into a basement junior suite as globalist, which was not nice at all. So we have asked to change back to standard room. Pool terrace is quite nice and good to spend a day or so. We enjoyed the restaurant options behind the hotel, which gave us a good idea of the real life in Athens… Wouldn’t mind to stay again for business, but not on a personal trip…