We accidentally spent 2 nights in Katelios, (we then moved to Lassi as Katelios was too quiet for us) and I thought I would just add a view with a different perspective. Katelios is VERY quiet. On the main drag there are about 6 restaurants all serving the same thing, and one bar, which was very nice, right on the beach and a lovely guy mixing the drinks. But if I had stayed there 2 weeks I would have been bored silly. This is not a resort to go to if you are not going to hire a car to enable you to go off and do something during the day, there is nothing to do in the resort day or evening, the ‘public’ swimming pools are plentiful and very nice, and you will easily find a sun bathing spot. We didn’t go to the beach, but the beach the main drag is on wasn’t much. Basically Katelios has charm, but it is VERY quiet, and is basically shut about midnight.
Would definately recommend the Metaxatos is Lassi, has pool, has bar, nice rooms. there is a beach a very short walk away, but the nicer beach is about 10 mins in centre of Lassi