Annick's apartment is in a great part of Mexico City -- very walkable to a lot of restaurants, cafes, parks, and bars. The apartment itself seemed like new construction, was very clean and cozy, and had nice amenities (like a 24/7 doorman, washer/dryer, coffee maker). Though I didn't meet the hosts, communicating with Setsuko was easy and she was very responsive. There were chocolates and two bottles of water waiting for us when we arrived.
There were just a couple of very small hiccups: For instance, I could tell from the pictures that this new apartment lacked some of the funky charm of older buildings where I've stayed in La Roma; however, my boyfriend and I live in a tiny condo in L.A., so we chose this apartment because of the pictures of the big outdoor terrace. Unfortunately we could not find the terrace!!! We left the apartment and walked up the building stairs to the top floor, but there was a closed door marked "penthouse" with no clear exit to a roof garden. To Setsuko's credit, she responded right away and said we were welcome to use the penthouse roof garden, but that's not *quite* the same thing as having your own private terrace.
I think leaving some instructions for visitors -- how to find the roof garden, where to take out the trash, recommendations for the best cafes/mezcalerias/etc. -- would be a nice touch for an apartment at this fairly high price point.