Our stay was absolutely perfect. Alexandra and Christina checked us in and provided us with accommodations throughout our stay. If you want to walk up to Oia, the stairs are around 230 steps that are not to be underestimated, but they are doable. It took us about 15 minutes to hike up, but you can ride a donkey up for 5€.
We couldn't have asked for a better place to stay or better hosts. I highly recommend staying at one of Nicoletta's properties!