The house is huge, full of light, clean upon arrival, beautifully located on the harbor. The kitchen is well equipped (and, to our delight, it was also provided with oil and essential spices and condiments), which made it easy to for us to do what we like most - preparing our own dinners. Plenty of clean linens and towels. Everything is at walking distance and there's a supermarket with everything (including fresh produce) and a moped rental place just downstairs.
Katerina is kind, available, and prompt at replying to any and all inquiries - however, it's best to interact directly with her for anything, as her property manager Anna does not speak English.
We would love to say that our stay was amazing, but we cannot. Unfortunately, we were not informed ahead of time of the construction work on a new house taking place right outside our front door. Meaning: early morning noise and hammering, construction workers on our porch, no privacy, cement dust all over the house within half a day, and various unwanted guests disturbed by the works and seeking refuge in the apartment. PS: the bathroom window does not close properly, so we advise you to keep an eye on what comes in from it. We got visited by an Asian tarantula (which however seem to be common in Symi...).
Katerina was very very nice to offer us a bottle of whine and cookies as a way to apologize, and we truly appreciated it. But we could have - should have - been informed about the situation when we booked. The fact that we weren't just left too much of a bitter taste with my wife and I. Shame.