Great location in a modern, secure building with doormen.
Since I have been in Mexico in the higher elevations I have been cold in many of the places I have stayed. Alejandra's apartment is on the ground floor of a high rise building (maybe about 8 floors) so it hardly gets any direct sun to heat it up. So for me the end of January and beginning of February I found the apt. cold but i was provided a space heater for my bedroom so I was fine. About a 10 minute walk to metro, and nice walk to many different areas and tons of restaurants and cafes and bars.
I stayed two weeks and I found her upstairs neighbor to be very annoying. It may be something new, and perhaps it can be resolved but right above the bedroom it sounds like someone is bowling. I know it sounds crazy and I cannot imagine what they are doing but one of my last days it started at 7:40am (just after Alejandro and Antonio leave) and continued all morning until I went out at 10:30am. And the night before it went on until almost midnight. So if you are a good sleeper, and you are out and about all day this should not bother you. Alejandra was not aware of this noise as no one had ever complained before. Also, my bedroom door is closed and she is usually in her bedroom with the door closed, so, not sure if that is why she has never heard it, but it was so bad (i think it got worse over the two weeks I was there) i wanted to strangle these people. You can always check with her to see if this has been resolved if you think it may be an issue for you. I don't think it was too bad my first week. Also, Alejandra and her boyfriend are very nice and will help you with anything you need. I barely saw them during my two weeks there but Alejandra always responded right away to my messages.