The apartment is neat, very charming - reminiscent of Paris or Shanghai's French Concession - and convenient (two blocks' walk to the National Congress, and from there, a 10-minute subway or express bus ride will take you anywhere you're likely to go in BA). There's a Chinese-run quickie mart around the corner that stocks all the amenities, and a large chain supermarket a block or two away. Cesar was a great, friendly, attentive host; he was flexible with his time to accommodate my flight schedule, provided excellent advice on the lay of the land, and much prompter than me in communication! We had a couple of lovely chats.

Note that this is a downtown core working lunch-y area, so although there are restaurants, you'd have to go 15-min further afield on foot for great dinner spots. Traffic dies down past midnight, so if you're used to going to bed at 11pm in a quiet suburb, you'll find it loud at night. If you're used to living downtown in a big metropolis with nightlife, you should have no problems (I didn't). The area is very safe for walking.