Stylish, modern and very clean apartment. Light and spacious living room and an excellent kitchen for home cooking. Good location in Sao Bento with amenities a short walk away, though it is - being Lisbon - uphill to Bairro Alto (15 mins), downhill to Santos train station (for Belém).
Just to note: keys must be collected from a city centre office. While the rental company offers a transfer service, it’s cheaper and probably just as quick to get the metro into the city.
I would stay here again.