Great place to stay if you can handle a quick 5-10 minute walk up to the castle, I personally found the walk a great part of the experience but if you are somewhat limited physically then it may be something to keep in mind!
If you are planning to have 6 guest, one of the bed is accessible via a ladder just an FYI. I personally did not have a problem with that at all but again, if you physically limited and plan to have 6 guest then this is something that needs to be considered in advance.
Aside from that, it was an amazing place to stay, I could not have asked for a better host (Vera, whom I communicated the most with) who was so charming, sweet and attentive! She even brought a new kettle almost immediately when the old one broke and brought more blankets and pillows on the same day despite her having such a busy day! She even gave us a nice introduction to Santorini. I would definitely suggest going for this place!