We had a great time, the location was great near Bairro Alto - it isn't a quiet part of town but the windows closed and the bedroom's are in the back so it helps for sleeping! The walls are thin in the apartment fyi. It is only accessible by stairs & the nearest street is private so if you are taking an Uber to get to the place, I'd recommend directing them to the street just above (Chagas). At night, it didn't feel unsafe but make sure to have your wits about you as it is an area for partiers and locals alike. The place is great with all the basic amenities and Anabela and Hugo were very responsive.
Make sure to walk down to the Time Out Market (yum!) and up to Manteigaria (for the custard tarts!) and our favorite dinner was at Cantinho do Avillez which is walking distance.