Location: I don't think it could have been any better: central and safe neighborhood, close to 3 subway lines and most major attractions, tons of bus lines 3 minutes away (making it easy to go to La Boca), close to the walking streets, grocery store at the corner, etc.
The apartment itself was really clean, tidy with a big window making the living room really bright. Also, let's not forget that Guille really deserve his "superhost" status: helpful, available and quite the gentleman.
My only critic about the apartment is that the kitchen (view as per Canadians standard) is not the biggest nor the most functional. It might be complex to cook if you are planning to have a dinner with multiple services, but It has all the equipment you would need to do so.
Overall, I highly recommend this place: great location, great host, many included "extras" that were really helpful (subway card, city map, powerbar with usb chargers, etc.). Definitely a fantastic value for the price.