We had a great stay at Betty's!
She and her husband Giannis were very open-hearted. They did everything they could to make the best out of our stay. They gave us advices for the island - where to find the best restaurants and beaches and gave us also a history lesson of the island and the dodecanese region. :)
The apartment is clean and lovely decorated. Even though it is connected to Betty's house it was quite at night so we had always a good sleep.
Nisyros is the perfect island if you want to escape mass tourism and spend some relaxed days.