Sofi's apartment is absolutely gorgeous and we loved our time there! It's quite spacious and bright, very cosy, and has all the amenities you could possibly need for a comfortable stay. The wi-fi was fast, and there was even an Apple TV for movie geeks like me to unwind in the evening after a day of exploring the city.
The location was really excellent - right in the heart of Palermo, minutes away from a ton of restaurants, bars and all sorts of shops. There's a one bar right next to the apartment, but it wouldn't get noisy at night. We'd walk all the way to Recoleta and Japanese Gardens on foot, and a taxi to the city centre would take something like 20 minutes. The apartment is also super close to BA's primary domestic airport, which is quite convenient if you plan to go to places like Iguazu and Patagonia. Ezeiza (the primary international airport) was about 50 minutes away by taxi (it might sound like a lot, but BA is a huge city, so it's actually quite reasonable).
The communication with Sofi was flawless and our check-in experience was perfect. I can heartily recommend her place to everyone and I'd certainly chose it again if I'm ever back in BA!