This past weekend I had the pleasure of traveling to Mexico City and enjoyed an overnight stay at The St. Regis Hotel. Nicely located on the Paseo de la Reforma, the hotel occupies 6 floors of a mixed 31-story residential/business building.
I was in a Grand Deluxe room, with a sweeping view over the Paseo de la Reforma, nice size of approximately 540sqft., very comfortable bed, nice size bathroom with a large rain-shower and soaking tub combined in a “wet area” of the bathroom, double vanities and w/c opposite the shower/tub area.
Attentive Front Desk staff, and as always, the St. Regis has Butlers for each guest.
The Grand Deluxe room:
I would shy away from booking an Executive suite here only because the living room area is very small. It is separate from the bedroom which is average size but the illusion created by the wall between them makes it look very tiny. Opt instead for either the Grand Deluxe room or a Luxury suite which has a full size living room area separated from the bedroom.
Very nice Remede Spa and fitness room. Small indoor pool.
Restaurants include fine dining at Diana Restaurant for breakfast, lunch and dinner with outside seating available, J&G Grill for casual dining lunch and dinner, the King Cole Bar for cocktails and The Atruim just off the reception area for afternoon tea and once weekly champagne ritual.
Transportation: From the airport a taxi took about 40 minutes (in some traffic) at approximate cost of US15.00. This was a taxi that I confirmed inside the terminal. Return to the airport, the hotel wanted 1445 Pesos! for an “airport taxi” (hotel car) which is approx.. US $96.00. Advisor Tip: Walk30 feet from the entrance, flagged down a taxi and pay only 93 Pesos ($6 US)6 for the 20 minute ride back to the airport. (about US6.00 !) I felt guilty about how much that was so I gave the driver an extra 50 pesos.
Saturday night I met up with my friend who stayed at The W Hotel ( I did not see any rooms here ) only because we were having dinner at a restaurant named Dulce Patria which is connected to another (recently) Starwood Luxury Collection property called Las Alcobas. This is a little GEM. Located in the exciting Polanco district (about 5 minutes by taxi from St. Regis) this area is Rush Street, Bucktown and River North ON STEROIDS. Amazing outdoor scene with the streets lined with restaurant for blocks. High end shopping a few minutes away, smaller boutiques and local establishments.
Las Alcobas was built as an apartment building and is now a 35 room boutique hotel. Beautiful interiors, done heavily in dark sycamore wood and amazing plaster work. They have rooms and suites here. The rooms are on the small size (again it used to be an apartment building) approx.. 250sqft. but the suites do have separated living/bedroom areas and are at least 600sqft. in size. 
This is the Presidential Suite which has a wrap-around terrace. Second pic is a deluxe double room, third pic is a corner suite (no terrace but plenty of space), awesome rainshower with 6 wall jets in ALL accommodations with very attractive rates here and they are Virtuoso and/or Luxury Privileges. 