We were a family group of 6 adults + a 2yr old that stayed in the apartment for 3 nights. It is a great place to stay. Modern amenities, clean, well appointed for 6 adults plus 2yr old - he loved his baby bed with 3 bedrooms and two bathroom!
The apartment is very well situated for everything we as a family wanted to explore. The vibe of the "old town" is awesome with ample places to eat, drink and explore within easy walking distance. Since we had two rental cars we did not use public transport, but it was in easily reachable walking distance from the apartment.
Only note of caution for people arriving by rental car - it is not possible to stop in the street outside the apartment to unload and the public parking presented some challenges until we worked out how to use it for our best experience. The City Central parking is within 150m from the apartment and although expensive was the easiest option for the arrival / departure portion of staying there. In between one can opt for the much cheaper public parking but that is further away.
Alexandros had a "board meeting" when we arrived to tell us about things to do and places to visit - we could only attend to a fraction of it in the 3 days we stayed and was greatly appreciated.
Should we return to Heraklion we will definitely want to stay there again.