We stayed 4 hights at the Zhero hotel at the end of August. It is cool and tendy with black and white decor throughout, minimalist decor, decking and simple - though good food/bar snacks and drinks. The rooms were spacious, the beds comfortable, good views of the bay, and good air-conditioning. Bathrooms were adequate - slightly poor lighting, and the shower could have done with being a more consistent temperature and a little more powerful.
The staff were as beautiful as the surroundings, both the men and women were all like something out of an A&F store!
The other clients were friendly and internnational - though as the hotel is run by an Austrian family, German speakers tend to dominate, though everyone spoke excellent English and Spanish too. Although there was one family there with their 3 children )aged 5 to 11) this is not a hotel for children.
The location of Cas Catala is fine - not too far outside Palma - but beaches there are tiny weeny and packed; there is not much in the way of night life or restaurants in the immediate vicinity, so on day 2 we hired a car - which was cheap at €35 per day; and then the island was our oyster. The hotel is close to a main road, which could be an issue if you wanted the windows or doors open at night. The hotel pool is fabulous, and they have music nights (House and Techno) on Wednesday and a great BBQ night on Sunday. As iti s a small hotel it is a question of participate (which we did readily) or get out of there, as it is a whole hotel event (but then as there are only 30 odd rooms that is not really so terrible.
Overall we really enjoyed our stay, and would certainly go back.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC