The location is perfect. Everything touristy is in walking distance, so it's perfect for that. You have a lot of restaurants, bars and supermarkets around it. Public transport such as busses, the metro and the train are also in walking distance.
The apartment itself is small and the kitchen is the best part. You get a huge fridge and freezer combination, an induction stove, an oven, a microwave, a dish washer and a washing machine. Be careful though, you don't get any laundry detergent and only one tab for the dish washer, as part of the "basic first kit". As well as only two rolls of toilet paper, a small hand soap and a small and a big towel per person. If you want more of each, you have to go buy your own. You do get cutlery and cooking utensils though, pretty nice ones, too.
As for cleanliness, it could be better. The mould in the shower and the dust fluffs weren't the best example for a clean apartment.
Our butler, who welcomed us, was the best part of it all. He was a genuinely nice person and made sure we know, that if anything, no matter what it was, came up, we could contact him 24/7.
Thank you Joao!