my wife and I recently stayed at Andronis luxury suites for our 10 year anniversary. Its location is wonderful. Central area where there are lots of shops//restaurants etc. The views are STUNNING! the place has an infinitely pool (never busy, which is a good thing). Rooms are all separate, so its not crowded at all. We were in the Hira suite at first. It was nice, cave style. I found this room a bit warm. But we were upgraded to the pythia suite, which was even more amazing. The hotel is always clean. The staff is wonderful, some of the most helpful/nice ppl I have ever met (on vacation/hotels). They truly care about you and want to make sure everything is perfect.
Breakfast had a lot of options, but were limited with some things (e.g. no pancakes or hashbrowns etc).
If you are going to Oia Santorini, this place is a great option. It is on the pricey side, but for the location, views, staff, its worth it! We loved our time there!