In overall, great place to stay in Koufonisia. We had a good communication/ check-in experience. We arrived with the morning ferry from Amorgos and Popi kindly proposed us to check-in earlier and get the apartment. Also, we were met at the harbour and driven to the flat. The flat itself had everything you need for 3 people. Only cons were: 1) slightly outside of the main village-centre, so need to walk a bit (5-10min) or rent a bike to get there/restaurants/etc. 2) last day we did not have warm water in the morning. All in all, we would recommend this place.