Look no further! This place may be a bit more than other Air BnBs in the area, but it is well worth it. First of all, Guillermo is an excellent host who is very communicative and has lots of recommendations for food and exploration. We tried two of his and were thrilled with the food! The place looks JUST like the photos - it is so cute - especially the French balcony. And it is very spacious. The bed is very comfortable (memory foam pillows!) and in a relatively quiet location (I am a light sleeper so these things are important to me!). Perhaps my favorite amenity was the washer/dryer IN the apartment. We had lots of laundry to do since we were in the middle of our vacation with a 4-month old, and this was a lifesaver! Though I will say, the dryer portion was not very good. I would suggest instead to wash the clothes and then hang them to dry (Guillermo can tell you where to dry them) - this was much quicker. Another plus was that the kitchen which was well stocked with things such as: salt, pepper, olive oil, vinegar, etc.
The location could not be better or safer - we were minutes (by foot) from lots of parks, museums and embassies. There is also a Hop On Hop Off bus that has a pickup stop not far away where you can tour the entire city. Also, there is a supermarket within a block (though it is not open on Sundays).
We really enjoyed our stay and highly recommend it!