We have a beautiful stay in sensyo. Elvira was an amazing host, she left us a beautiful note and some local wine, water and juice in the fridge. She also come to visit us as soon as we arrived and was very helpful.
The room was clean, exactly like the pictures an the view is amazing. The apartment is well located too, only a short walk from Fira town.
You have many restaurants and is very close to the church, the Firostefani main square. You have plenty of restaurants and a little market too. Next to the church is the bus stop to Oia.
The cave experience was great for sleeping, is very quiet and the temperature in the room was OK (may). Remember that is a cave! and you don't have any windows near the bed. Also pack light because of the stairs.
We definitely recommend it!