We stayed for 6 nights at the end of the tourist season in Stalis (middle of October). It is a good time to visit, because Stalis/Stalida is clearly a beach holiday and party spot, it must be super crowded in summer.
The apartment is a single unit right by the water front, just at the end of a long strip of tourist restaurants, bars, and shops - but luckily not on it. You can reach the beach and diving spots by foot. If you want anything other than beach life, you'll need a rental car ideally. The apartment is very comfortable and well-eqipped, a nice holiday home.
Joanna made sure everything was in order and taken care of, very friendly and easy going. She let us in the apartment when we arrived, and visited once before we left, for everything else we were in touch via Whatsapp.