We would gladly recommend Kat's plac to everyone. It's located in one of the nicest parts of the city with a lot of little stores and restaurants close by (in fact one of the best traditional family run restaurants is almost next door, Cantinho Lusitano. Just make sure you've made a reservation). The street is very quiet. The place it self is beautifully designed and has a little very private patio. There is anything you need to the rest after day running up and down of Lisbon streets. The apartment very clean and it is really one of the cosiest place we've ever stayed.