The host was very gracious - I gave her the wrong tone of arrival and her son waited for me patiently for over an hour. I was mortified when I realized my mistake, but they handled the situation very well.
The apartment is very spacious, clean and in a good location, very close to the old city center. The kitchen is a bit small but has the basics in it.
I took the D bus just about 3 blocks from the apartment (on the same street) to get to the train station and then got the aerobús that goes from the train station to the airport.