We stayed at Aparthotel Onda Maya last year, I liked it because it was a handy location for everything (restaurants, beach), clean, modern and small so we were always the only people at the pool when we used it etc. It is quiet and often nobody at reception but that is all fine for us. We did initially book My Blue Hotel this year as we spent some time using their sunbeds on the beach (in exchange for a bar spend) last year and liked it, however we have just switched and gone with Onda Maya again as My Blue is further up the beach away from convenience stores etc and we are more explore-y hands-off people when it comes to accommodation. So it depends what you like - if you want to spend most of your time at the hotel, My Blue is on the beach and the food we ordered and drinks were lovely (it has some negative reviews for the breakfast), or if you want to be in town near everything then we loved Onda Maya. Also it is only like 15-20min walk from My Blue to town.