We stayed at Romantica beach early June which was perfect weather wise. The living accommodation is adequate for your needs with a small kitchenette, one double bedroom and two single beds in the lounge / kitchen . Balconies are a good size with lovely views over the sea .The beach opposite is small but nice with soft sand out into the sea . Top tip is to take mosquito repellent as they are in abundance and thirsty !
Supermarket is a 15 min walk and has everything you will need and not too expensive. Great restaurants nearby especially up the hill at old hersonissos etc . There is fresh fish van that calls opposite the pool everyday around 2pm if you fancy a night in with plenty of seabass , bream etc
All in all a good stay