This is a very spacious apartment, located just a block and a half from a metro stop that has lines both to the airport and to downtown. There's a nice market right across the street, with several good coffee shops, tapas bars, middle eastern restaurants, and other places to get food and drink. It was pretty easy to get in touch with the person who gave us the key and let us in.
The only slight downsides are that you have to walk up two flights of stairs (which might be a bit tiring if you have a lot of luggage or if you've been walking around town all day), and that you need to be careful that the drain in the shower doesn't back up (once I noticed it was an issue, we could just be quick with showers so it didn't flood).