The location can't be beat, and the apartment was extremely clean. Marziyeh and the manager are both very easy to communicate with, and the set-up is clear and easy to follow. The one bedroom is very spacious, and the converted balcony/bedroom also provides ample room for one or two people to share. I highly recommend Marziyeh's apartment to anyone looking to stay downtown.
The one minor issue I had was the 5pm check-in -- fairly late compared to other Airbnbs and hotels. Check-out is also at noon, so something to keep in mind. This may be because the unit is managed by a third party who manages several other units (and the manager was extremely helpful the entire time), but it is something to note.
All in all a great trip and we would definitely stay here again without hesitation!