Carlos’s place is in an excellent location, very walkable with lots of great places to eat and different neighborhoods worth exploring like Roma Norte and Condesa nearby. The check in process can be a little bit tricky if you’re not fluent in Spanish. Thankfully the guard was very nice and demonstrated how it worked (there are multiple doors to unlock/lock). If staying with a group, note that there is only one set of keys so you will need to do some coordinating. Overall, it was a good stay.