Julia's apartment is in a great location and was very comfortable for my stay.
The only minor issues were the amount of street noise (especially on the weekend) and the wifi speed (it's fine for streaming TV and general use but was slow with uploads and downloads which I know is probably not most people's concern). The noise is something that seems to be a general issue with apartments in Barcelona and is by no means specific to Julia's place but the bedroom is in the front of the apartment overlooking the street (with a nice balcony) so it's just something to keep in mind.
The check in process was easy, she always replied quickly to any questions and was very accommodating for check out!