Although we didn't get to meet MaryJo, she was quick to respond to any questions and was kind enough to order the garrafons of drinking water on our behalf when we realised our Spanish wasn't quite up to scratch!
The apartment is in a fantastic location - Escandon is a lovely neighbourhood in its own right, but it's also close to Condesa and just around the corner from the metro station. We used Uber to get around too and drivers found the place no problem.
The apartment also has good and reliable wifi, and the apartment block is really quiet and safe.