While the views from our unit were truly breath-taking, the climb down to our room and/or up from the unit to the main roads of Oia was extremely difficult. The stairways are inconsistent, unsteady, and winding. Carrying any bags with you proves to be more than a normal, doable challenge, especially on a warm day. The room itself, while clean, was not as luxurious as advertised. The floor paint was chipping/peeling everywhere, the bathroom shower is tiny & messy, and the kitchenette was barely usable (sink faucet was loose & leaking, stovetop was totally out of commission, mini-fridge pooled water all over the floor). Don't expect a unit that looks/feels fancy, your payment for lodging is mainly due to the view from your room.
Pros: The epic view!
Cons: A new coat of paint inside the unit(s), a working stovetop, a non-leaky kitchenette faucet & refrigerator, and a shower curtain in the bathroom.
Location: Access to Oia, but not without quite a hike, lots of shops & restaurants.