You can believe all the excellent reviews for this place, it really is a fantastic apartment - if anything, I thought it was even better than it looked on the website. If it's available when you want to visit Mexico, you should jump at the chance.
It's very stylish, spacious, quiet, clean and secure, the wifi is excellent, and the people at the reception desk are friendly and helpful. Also, Juan Pablo provides a list of recommended places to go, as well as an invitation to his cinema (sadly, I wasn't able to fit this in).
The area it's in is has a traditional Latin American feel - visit the nearby Alameda de Santa Maria on Sunday afternoon for the full Mexicana experience - but with some contemporary coffee bars etc and a modern shopping mall within easy walking distance. There are 2 metro stops an easy 12 mins walk away.
I wish I could've stayed longer, I didn't want to leave, and I really hope to be able to stay here again some day soon!