I stayed at Gustavo's studio for the first time in September 2017 (read my earlier review) and didn't even consider staying elsewhere when I returned to Buenos Aires in December 2017. And the reason is simple: Gustavo is a *5-star* host, and his spacious studio is amazing! Everything was perfect—communications, welcome, check-in, amenities, cleanliness, comfort, location. One more plus I only verified this time: the AC (which wasn't really necessary in September) worked very well—and note that temperatures were above 30 C / 90 F! I highly recommend Gustavo's studio for a taste of the best porteño hospitality.