The apartment was VERY good. It had plenty of space and it was nicely decorated. It's location was very good too: waking distance from everything and in a very nice area filled with restaurants and cafes. It had very small cleaning issues when we arrived, but they were nothing you couldn't solve with few desinfecting wipes. It had most utensils you may need to be comfortable at home and do some occasional cooking.
Alex and Maria were very responsive, accommodating, and helped coordinate transportation from/to the airport. They provided clean linens when needed since we had a multi-week stay.
In general we had an amazing time during our stay. The location was superb, and the apartment was a very comfortable/cozy. We would strongly recommend them for your visit to Athens.