Ana Regina's place is great, very cozy, great location (about a 15 min walk to Condesa), and super quiet (this is actually really hard to find in Mexico City). Ana Regina was also very responsive. The security guards are very helpful and friendly. My only note is that the kitchen is not very well equipped. We had to purchase a knife and borrow some tupperware from a friend because it is definitely missing a lot of basic utensils for cooking. Definitely a let down for long stays.