Stratos's apartment was excellent. It actually turned out to be 2 apartments side-by-side, one was a 1BHK, and the other was a 2BHK. Not what I expected (was expecting a 3BHK), but this worked out perfectly for us since we were 1 couple and a family of 4.
The location of the apartment is fantastic! 10 mins walk to Psirri and Monastriaki neighborhoods and a 20 mins walk to the top of Acropolis. The neighborhood of Keramikos itself has a lot of really cool restaurants and bars. Overall fantastic!
The only slight disappointment was the kitchen - it was poorly stocked (oil, salt, sugar, etc basics), and had limited pots/pans. Wouldn't matter to us normally, but with a family, its nice to be able to cook breakfast at home before heading out for the day. We were still able to make some omelettes etc, but definitely could be a bit better.
However, I also stayed at another apartment in Santorini, and I found the same issue there as well. So I wonder if this is more of a greek apartment thing...
Overall, I'd definitely recommend!