Everything perfect!
The apartment is situated near the harbour, there are supermarkets and restaurants in the adjacent streets and the Old Town and KTEL bus station are within walking distance.
Small tips: If you want to have breakfast/coffee there's a small bakery within 2 minutes walk (Anna's Choice) and great frozen joghurt at the Chill Box opposite to it.
Check-in/out really easy and very friendly host. We communicated with WhatsApp.
We enjoyed the rooftop and the apartment is well furnished.
Only small negative point is that the bathroom is pretty narrow. This is just a kind warning for tall people.
We would definitely book again by Stamatis if we come back to Kos!