What an absolutely stunning flat. There is no other places to book but here, the view is stunning, the flat is well maintained, super modern and comfortable. We had a little problem with the boiler, but that was attended to immediately. There is 24 hrs security and a gym with a spectacularly view.
As mentioned below, it isn't in central Palermo, but there is plenty of food options nearby and it's very close to Plaza Italia metro or to take buses or taxis. I will definitely book here when I next visit Buenos Aires.