Our party of 6 (one couple + one family of 4 with two teenagers) had a great time staying here. The location is stellar. There are two cafes on ground floor that are good places to grab a quick bite or drink. You walk out and shortly down to the left and there is an active pedestrian mall area that is good for shopping, eating and people watching. The Plaka district is very close by. Alexi gives wonderfully comprehensive information on the surrounding area including some food recommendations. There is a moderately active street below so you may hear some noise, especially if you are in the bedroom adjacent to the street as I was versus the other 2 buried deeper within the unit, but I had no issues with it. That's part of the excitement of city life. The unit is far enough up and well-insulated enough to dampen a lot of that noise....plus, I always run a white noise app on my phone while sleeping anyway.
As you can imagine, we were being tourists and out seeing the sights the majority of the day/night, but the unit had everything we needed when we arrived back at the end of the day. The place is spotlessly clean. The rain-head showers are fantastic and spacious. Linens, soap, toilet paper and laundry detergent were all provided + a few unexpected extras (a few bottled waters in fridge, bowl of apples). The coffee urn and instant coffee were nice to use while waiting on others to wake up. I did have to use Google Translate to figure out the language on the all-in-one washer/dryer unit plus some deductive reasoning (make sure the cycle you select on the dial has the sunshine icon lit to have it dry the load after it washes).
I strongly recommend staying here. It is a great, centralized vantage point from which you can visit all that Athens has to offer.