I stayed at Marco's place for 14 days. Importantly, I only stayed at this particular listing for two days since the internet was very slow (sometimes less than 1MB, which wasn't even fast enough to load a YouTube video). Since I work from home and need a strong internet connection for video calls, Marco moved me to a different room downstairs where the connection was fast and reliable.
This place is excellently located. (IMPORTANT TIP: Do not use Google Maps! The walkway nearby doesn't appear on the app, and this is by far the quickest route to the main restaurants in Polanco. Instead, walk in the direction of the big Mexican Flag to cross the walkway. Once on the other side, you can safely use Google Maps to route you to your desired location in Polanco. For example, this method will bring you to a nearby Starbucks in about 2 minutes as opposed to the approximately 20 minutes Google Maps will take.) Other advantages of this apartment include the functional air conditioning and green foliage.
As far as negatives, I only experienced two cons while staying at Marco's place. First, there is very little sound insulation between each apartment at this complex, so you may hear a lot of your neighbors if they rambunctious. Luckily, this wasn't a big problem during my stay. Next, the cleaning crew entered the apartment while I was sleeping on four occasions. (There is an inside lock but it doesn't prevent them from opening the door.) To be fair, the crew did knock the first three times. But when I didn't answer, they came in anyways, realized I was sleeping, and then left. I thought this was a bit unprofessional and should be fixed by the apartment's managerial staff.
Overall, I would rate Marco's place a solid 4.5 out of 5 and would happily return.