The flat is super cute and communication with Íris was really good and completely effortless. She'll send you a PDF with loads to do and see which I found great and very helpful. The building the flat is in is rather old and it can get noisy. It is pretty central but I found the immediate area around the flat a bit dodgy after dark but that being said it's super easy to get to Alfama by foot and the Metro is very close to the flat. All in all I would very much recommend staying there as the overall experience was very positive.