Start from good part: localisation is great - 5-10 min walk to any essential place in Palma.
From unpleasant part: fan in room makes no difference at all - during nights terrace was cooler than room itself. But - you cannot sleep with open windows as area is quite loud because of locals having constant arguments after 2 AM.
In the apartment there is 4 rooms for only one shared bathroom/toilet. That's completely not enough for 8 people in one place. Not mentioning kitched - two chairs and small table (goods for you if you like to have meal in town).
Overall experience made me feel that I was in dormitory more than in even hostel room. It was clean though.
Good for non-summer months with low season.