My friends and I spent a great week in the Alex's apartment. We were 5 but did not feel cramped inside. The quarter was not really touristic, it is probably more a local people area which we really enjoyed as we felt the real Spanish life-style (with cheaper prices especially in restaurants and bars) while still being very close to the "must see" places in Palma. Obviously the big terrace is the cherry on top of the apartment, where we enjoyed sunny breakfasts and cosy evenings.
Alex and Seb have been lovely hosts, always happy to give us advices or help us for any issue we met. They even took us to a party and invited us to have a drink on their terrace (they just live next door).
To conclude, I would definitely recommend this place and would probably come back to Alex's apartment for my next stay in Palma !
Thx again :)