Lu was wonderful! Dates were a bit mixed up so we had to stay at her neighbor's the first evening, but everything went very smoothly.
The apartment is bigger than it looks in the pictures (and there is a 3rd bedroom), the second bathroom is outside in the patio (just FYI to future guests).
Lu responded to any of our questions or concerns almost immediately, was incredibly helpful and friendly.
As to those who have mentioned the noise: this is centro historico so noise comes with the territory, but her double windows helped cut this out considerably and the location is impossible to beat!