We loved staying at sensyo's. The soundscape cave is absolutely adorable, the view leaves you speechless. It is very well located, 2min walking to the bus stop, mini market and restaurants, 15min walking to Fira.
A couple of details to improve, though: the apartment was not cleaned every day (which you would expect, for the price); kitchen poorly equipped;A message meant to be delivered to us, regarding a delay in a planned excursion never reached us and the taxi arrangement for our last day wasn't smooth as expected.
However, when you sum all together we would recommend staying in there. Is definitely worth it.