We had a great stay at Halinas appartement.
The place is sunny, confortable and well located in a quiet part of Barrio Alto with great restaurant around. Halinas and Victor were very accommodating with our check in time and very responsive overall.
The only downside is that although noise insulation from the street is very decent, noise insulation from other appartement is quite low since it's an old building. Contrary as stated in an other comment you definitely have neighbours above and you can distinctly hear them walking and moving furniture around.