Really enjoyed our week-long stay at Carlos' apartment. The place is a 5 minute walk from the central Ave de America metro-stop. You can take a bus straight there from the airport, and you can get anywhere in the city pretty easily. Lots of grocery stores, bakeries, and shops close, and the kitchen has everything you need to cook meals. I work online- so I needed reliable, fast internet- which this place has. There's tons of towels and sheets, a washing machine and laundry detergent.
The bed is a little weird for two people, since you have to pull out the bottom mattress and raise it. We stacked the duvets to bring the beds up to the same size and it was fine.
Last thing I'll say is that the place is small- but it's plenty of space. Enough to do yoga even with the second bed pulled out.
Thanks Carlos!