We stayed in White Utopia lower unit in early October.
Pros:The unit was very clean, well equipped kitchen great bathroom and hot shower. Easy walking distance to restaurants and shops of Imerovigli and caldera trail. Great taverna just across the street. Beautiful sunrise view to the East. More private feel and location than many Caldera rim units. Giannis was very responsive to questions.
Cons: Not really a con but mistake on my part in research: the lower units have eastern sunrise view but not Caldera sunset view, just to be aware.
There is a portico out front but unit is close to a busy road; we had to keep windows closed on that side due to road noise. Beautiful veranda on east side with tub but would benefit from a canopy as sun was intense with no shade.
We had trouble with jacuzzi; for October the water wasn’t warm. Controls to jacuzzi are disabled. Giannis did have someone come to adjust temperature but tub covers are not used so may only be an issue in cooler months. Couldn’t use jets.