If you have the opportunity to stay here, do.
Location at south end of Parque Mexico a half block off of Amsterdam is excellent.
The building is very special, one of the few I've stayed in with people living there who likely have lived there for decades. Treat the building and the people well if you stay there.
The actual apartment is simple and beautiful. Full of light, very nice furniture and decor, well equiped kitchen. Spacious for one for two people. Plenty of blankets and pillows and towels. A massive bathroom.
I had no problems with wifi - worked over zoom from the apartment for days.
I had no problems with the hot water - works like hot water does in old buildings, well if you know how to let it run for a minute.
And Susana is lovely.
Stay here!