Alejandro and Macarena accommodated my situation. I was arriving early from the airport and they managed to let me in early so I wasn't stuck on the street.
The apartment is exactly like it looks in the picture. Clean, lots of lights, and with everything you need for a medium-term stay.
I work online and needed good internet/wi-fi. The internet in the apartment was superb. I think it was 20mbps up/10mbps down if I remember well. If that is a must for you, this apartment will work for you.
The apartment is in an older building, which isn't bad. However, the elevator is from another decade and will make the most annoying ringing sound if someone doesn't close the door quick enough (which happens hundreds of times per day). This is apparently something common in Buenos Aires, and it's not really Alejandro and Macarena's fault, no can they do anything about it. If you are planning on doing lots of tourist activities, it shouldn't be an issue, even though I would advise you to get earplugs if you plan on sleeping in or are woken up easily.
As well, if it is your first time in Argentina, make sure you get them to show you how to open and close the persiana (Argentinian window blind). I love it because it blocks the light extremely well. However, I almost broke it because I didn't know how it worked.
If you're staying for longer, make sure you get them to explain where to take out the garbage.
As for the neighborhood, Palermo is extremely large, which I didn't realize. If you are a younger, single person looking for action, this isn't the best part of Palermo for that. Better Palermo Hollywood or Palermo Soho for that.
If you're a couple on vacation. This is the perfect neighborhood for you. Nice and quiet.
Thanks guys!