We stayed in the flat for a total of three weeks, doing home office and enjoying our free time in Lisbon. In spite of having stayed there during the hugely popular Festas dos Santos populares, the flat has never been too loud, made exception for the last weekend of the fair when even the small restaurant in front of the building started blasting music at high decibel levels until the wee hours of the morning. Since we knew that, we escaped Lisbon during that weekend. The flat itself is great. Very compact but well thought out. Perfect for two people. The bed is comfortable and has a good size. The kitchen is more than decent and we cooked many meals from simple salads to oven-cooked vegetables and pork roasts. The bathroom is new, has an excellent shower and no foul smells whatsoever (a problem in many other flats in Lisbon, apparently). The Wi-Fi is solid and stable (ca. 30/35 Mbps) and allowed two people to work, have constant Zoom-calls and the likes. The location is lovely as long as you're prepared to steep walks up and down the Muraria hills. The very good supermarket that served us (Pingo Doce) is a good 15 minutes walk up the hill, if that's not a problem than this is the place for you. Right in front of the building is a mini-market with some essentials, in case you should feel lazy. :) The only (minor) downsides were that the flat has no washing machine hence for our long stay we had to rely on a laundrette (also uphill, close to the supermarket) and the fact that even though we stayed for three weeks, no additional cleaning was offered. We mopped the floors ourselves and cleaned the bathroom several times as all cleaning material is available. Hoping to be back in Lisbon soon, we would definitely try to stay at this flat again.