Split Type Aircon: Which is best?

[dr. d]

my colleague had house originally split-airconed.
had to destroy part of the wall after a few years, as they had to look for the leak. the straight, un-coupled tubings were (belatedly bad decisionedly) embedded inside the wall, about a dozen feet or so. the other half of the split was just outside the wall, sitting on the terrace.
window type na siya ngayon.