The place is in the perfect location! It feels luxurious to have such a large apartment to live in (especially by European standards)! The noise from the nearby bar (which I highly recommend visiting as the cocktails are fantastic) is not noticeable at all if you've stayed in a city before and neither is any noise from the street; it's just typical big city white noise in my opinion. Overall, it was an incredibly stay in Lisbon.
The only sore spot, as others mentioned, check in wasn't ideal but there is a note about it on the listing itself so be aware! It seems that when we got there, the button for the hostel wasn't functioning so we needed to wait for someone to exit the building to enter. This was a concern for check out as well, but the button was fixed by then! Just be aware and plan around this for your arrival/ departure. :)