The flat was clean and comfortable and had everything we needed for our 4-days stay.
There is an almost fully furnished kitchen where you can make breakfast, tea or coffee and wash your swimsuits. The bathroom is a bit small but this wasn't a big deal with the kitchen nearby. The flat is located near to the city centre and the old town. This was great but the beach we went to (Nea Chora) is not really close. There is an old beach nearby (Koum Kapi) but it's only for swimming and there is no sand area there. Nea Chora is on 20-30 minutes of walking from the flat but it's a really good place.
Stefanos was a nice host, he answered all of our questions quickly and gave us good advices for our trips. I recommend the flat.