We have stayed at this hotel twice now and cannot recommend it enough -
location-right on the best part of Kamari beach, with its own free sunloungers
rooms- classically Cycladic design with all the modern amenities, clean and spacious, we had a deluxe 2 bedroom apartment.
pool/bar/restaurant areas- amazing design and very comfortable
food-upmarket,modern, a little pricey compared to the usual tavernas but very good.
staff-we were treated like VIP's by everyone from cleaning staff to the owner /managers, nothing is too much trouble
I would stay here again when visiting Santorini, its a 15 min taxi ride to the calendra/FIRA but we like the beach during the day and Fira at night, I first stayed here with my Greek cousin Christos and since have visited again it was nice to be recognised by the management after a year , a sign of good management and care.The pool bar area is amazing and its right in the middle of the action on Kamari beach, yet a private haven perched over the beach.

I have been to Bellonias over the years, and I love how it has changed. Still traditional in feel, but sophisticated! The restaurant Eila has great food.... Breakfast at Bellonias Villas is a special way to start your day. The owner is lovely, and the staff the best !! I recommend staying here no matter what !

Writing this review at the last day sitting at the bar and watching the waves.
My wife and I spent a wonderful week at this lovely place!!
I can recommend this hotel because we will come back - for sure!!
Service, staff, rooms, pool, beach furniture is excellent.
Tip: wanna have a great dinner? Go to Metaxi Mas - with taxi 10 eur from hotel.

Bellonias surpassed our expectations in nearly every possible way. The hotel is super clean (rooms, bar/restaurant, pool, common areas); has an amazing location (right on the beach but you still enjoy privacy); a very friendly and helpful staff who are "invisible" when you don't need them, and very attentive to needs if they arise; great breakfast buffet (simple, but good); and - in my eyes - is the esthetically nicest hotel in Kamari.

Towels, A/C, safe, shampoo etc. and wi-fi is free of charge (as should be, but seldom is at these types of destinations). In addition, guest enjoy free sun-beds on the beach.

The bar (drinks) is great, but the restaurant (food) is disappointing - especially considering the price level. This however, is no big deal as there are plenty of good eating alternatives nearby.

We would (and probably will) revisit.