Don't let the graffiti on the street bother you; the apartment is lovely and the street is safe at night. The location is perfectly close to everything; we never took a cab or public transit. Alex speaks perfect English and gave us a map and a run-down of local highlights and eateries. He is also very quick to respond to messages. The apartment is very comfortable and modern and has a/c, and the balcony is great. There is a small, quick elevator, but you'll need a flashlight if you prefer stairs. Alex also arranged parking for us in a private, fenced-in lot next door.
We'd totally stay there again.