I can highly recommend staying in this apartment. The apartment has everything you need to live there even for a longer stay. You live in the middle of the normal neighborhood of Heraklion and less touristy. There is a 24/7 store right across the street.
Dimitris is a very open-hearted host, who can be reached quickly and also always answers.
The handing over of the keys is especially uncomplicated. He also has very convenient WiFi, which you can also carry around with you on site.
The apartment is centrally located to the city center and the sea both about 15 minutes walk. The beach itself is a bit further away. But can also be reached on foot or then by bus.
Iraklion itself is less a seaside resort than more a city trip, but there is still the life of the locals far out of season and is still suitable to spend time here in the winter season. There are countless shopping opportunities and great restaurants. In addition, the most important museums and cultural sites of the island are located here.
If you want to see the rest of Crete a car would be recommended. Iraklion is a good base from which to explore many places on the island.