Just returned from a 7 night confirmed suite* stay at this property, and it was memorable. It was the obvious location for me, because some friends who recently retired to Mexico live 2 blocks from the hotel. Here is the good, the meh and the *ugly:

Good:
- the location for first-timers like me is great because of the proximity to the park and high-end bars and restaurants (that's our thing). I agree with others that you don't get the whole CDMX experience. Ubers from here are plentiful and cheap, about 1/3 the price of my Florida rides. Why would anyone take a bus/metro when a 15 minute trip is $3?
- the 40th floor Regency Club was 11/10. The breakfast and evening tapas layout was amazing, and the staff got to know us, bringing us our preferred beverages in the morning and cocktails/wines in the evening as soon as we arrived. They went above and beyond and were our favorite part of the hotel. And the view!
- the executive suite on the 42nd floor we got to enjoy for our final two nights (more later). Just massive, like a decent sized apartment.
- service was quick and mostly responsive, whether it be for additional bottles of water or ice. Wi-fi was screaming fast.
- the view is off-the-charts. I couldn't stop taking pictures at different times of the day as the light changed over the mountains and valley.
- the price: under $200 all-in per night

Meh:
- the technology didn't always work fully, like the too-complex lighting systems, the multi-head showers or the "smart" TVs, which never did anything for me, even though I had my bag of HDMI/USB/bluetooth tricks.
- the lobby had 6-12 concierges, desk staff and "hosts" around-the-clock, and sometimes walking through the lobby felt like being approached nonstop by mall kiosk employees.
- did not try any of the restaurants, they were outrageous by CDMX (or even US) pricing standards. We had some delicious (and cheaper) meals at the Four Seasons and other top-rated restaurants nearby.
- standard rooms are average. We got to experience two of those (more later). Fridges are small and full of minibar items, so you have to remove everything just to store a couple of personal items.
- if you do not get housekeeping for the day, even if you request no service, they will call you/phone message repeatedly to see if you still want it.

The Ugly:
- Do not under any circumstance accept Room 1012! It is the 5th and lowest floor for rooms and I believe the only Regency Suite on that level. 3 nights in, the bathroom drain backed up while we were out for the day and flooded the room. 5 employees worked for hours fixing and and cleaning up the room while we grabbed our things and evacuated to a standard room. They must have known about water streaming down to the lower floor, because my room phone had a message about a "water issue possibly coming from your room" but they never entered while we were gone to stop the problem.
- After assuring us that it was fixed, the still slightly-damp room did it the following night, returning to find the room with an awful smell and an even wetter mess. Another standard room, then moved to an executive suite. We "enjoyed" 4 different rooms on the property in 7 days. Two nights were comped by the very apologetic daytime manager, but the evening staff was not very proactive about the issue. A refund of the suite certificate was hinted at, but I'm not sure if it is something I should pursue after the fact, as I am still exhausted by the stay. However, I am getting very good at packing and unpacking our suitcases within minutes.

I would definitely stay here again (and plan to in a few months unless the new Andaz is ready), but would sleep under a tarp in Chapultepec Park before staying in Room 1012 again.