I have stayed at this apartment many times over the past 2 years and absolutely love it. It is in the perfect location with the perfect amenities. It is in the middle of everything! The apartment is within 2-3 blocks of 3 different subway stations (Bellas Artes, Hidalgo & Juarez), walking distance from Zocalo and Reforma Avenue. AWalmart is a 20 minute walk or a short taxi ride.
The complex is very modern, private and secure. The owners are very accommodating, friendly and nice.
If you prefer to stay in an apartment when you travel, then this is definitely the perfect place to be when you are in Mexico City.