We LOVED staying at the Arty Belem apartment. It is so close to so many of the main attractions in Belem, the monastery, the explorers monument, LX Factory, the pastel de nata bakery, and a short tram or bus ride to the center or a lovely walk. Being in Belem was a nice change of pace from the bustling center of Lisbon at the end of the day and great location for a day trip to Cascais.
The house was clean, the beds comfy, the apartment beautiful, the check in was thorough and so friendly. There are supermarkets and shops nearby. The house is filled with light and gorgeous art.
Sadly the Sintra sights were closed because of fire danger when we were staying so we will have to return!