Theoxenia Hotel was great for what it was. It had:
1) clean, comfortable, quiet rooms (some of which had amazing views of the caldera)
2) delicious breakfast delivered to your room or one of two common deck/patios
3) a fantastic roof deck with views of sunrise (great for having breakfast) and views of sunset (great for having a bottle of wine). Note that when I went in late September, the sun would set behind the island of Thirassia, so you couldn't actually see the sun set into the water from anywhere in Fira)
4) gracious staff with excellent recommendations on other activities to do on the island and restaurants. We had to ask for their thoughts; they were not pushy at all.
5) access to a pool at a sister hotel down the street
6) firm, no nonsense beds that were nonetheless comfortable (in our room, at least). linens and towels were changed every day, if we wanted. maid service cleaned our room once a day.
What was less great:
1) the neighborhood is very noisy at night (and all day). Just a fact of being in downtown Fira, nothing to do with the hotel. The good news: the doors to our balcony were incredibly soundproof. The bad news: even though it was beautifully cool at night, we had to close our doors and use the A/C to keep the room cool
2) the pool is very nice for sitting and having drinks, however it has no view (you could be anywhere in the world... surrounded by walls) and is a ~3 minute walk from the hotel. Not a burden, especially given the price, but also not as convenient as the other places we stayed on the island.
Overall, great value, and fantastic experience.
Room Tip: Try to get a room on the top floor... they have beautiful views!
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This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC