Penelope was extremely helpful when my flight was delayed, responding quickly to my messages and allowing me to check in by accessing the lock box instead of meeting her. The apartment is very cute, and as described. There certainly are a lot of stairs, so be sure you're comfortable with that. The neighbourhood absolutely could not be beat- so charming and everything you need is within walking distance. I spent most of my time on this short visit to Mexico City just wandering around Condesa and trying out the many restaurants. Highly recommend!