I can't recommend this place enough! We loved it! It's in a great location, close to Retiro and the ferries to Uruguay. It's easy to get to all parts of Buenos Aires from the center. The apartment is lovely. It was bigger than I expected and very clean. Guille even had some essentials when we first arrived (bread, fruit, dulce de leche, water, coffee). There is a big TV with Netflix and the bedroom is very nice and the bed is comfortable.
Guille was always easy to contact and always wrote back very quickly when we had questions. We will definitely stay here again if we're back in Buenos Aires. It's a great value for money and Guille is a great host.