Hernán's place has a lot of character. The art is moody, the bed is small and old, the kitchen pot/pans have rusted or are broken and many of the cups are chipped. While frustrating at times, the apartment itself is wonderful.
The location is amazing, but I'm sure you have read that in other reviews. It's minutes away from Puerto Madero, Plaza Dorrego and downtown BA. The stairs are brutal to walk up if you have 5 big bags like my boyfriend and I did, but otherwise didn't bother us.
The apartment is well set up for a long term stay. It has everything you would need to wash clothes, cook and read (loads of books). The wifi is very spotty, but come to find out, it is everywhere in San Telmo. The bed was too small for my 6' 3" boyfriend and myself, but could fit smaller people more comfortably.
The AC was great during the summer! Offered in both the living room and bedroom. The mosquito net was necessary during this time as well, and still some managed to get me!
Unfortunately we ended up leaving early as there was an issue with plumbing and no one on site to help us with it. That being said, Hernán was more than happy to refund us our stay so he could get the issue resolved.
Overall I would recommend this apartment to anyone who wants a true BA living experience.