We stayed 4 nights at Panagiotis house and loved it from the first moment.
The pictures show exactly the house at is is. It is newly renovated and in the middle of Koskinou Old Town and has everything you need: a fully equipped kitchen and a quite small but yet comfortable bathroom on the ground floor and a huge bedroom in the first floor. The huge terrace is a real winner.
Communication with Panagiotis was very easy. He responded very quickly to all our messages and was there to welcome us and show us around the house. He also put water, juice and other things in the fridge and provided us with coffee and a bottle of wine.
Right around the corner is a very good tavern and another one just a few more steps away. Also in walking distance you can find a supermarket, a bakery and a few cafes.
We had a really good time in Koskinou and would definitely recommend staying at Panagiotis' place.