This is great place to stay. Do not look up the directions for "Olga's pension" on google maps...it will take you to the village (which is very far away). It's near the port, a taxi driver knew where it was, so ask one of them.
There is a warning tho: if you search for places in Santorini, this place will show up even though it's on a different island...Ios . We made that mistake, but the owner and manager were very helpful. We first requested a refund because we weren't initially planning on going to Ios. Even tho we booked the non-refundable rate, they were willing to refund it if the booking agency didn't already charge us. They did, and there were no ferries until the next day so they moved our booking so we could start the next night instead, very generous given we had the no-change rate. Ios was great! Definitely recommend visiting!