Peter's flat is in a great area, just round the corner from lots of places to eat and drink, it's perfect for enjoying the nightlife of Bairro Alto. It's also within easy reach of lots of other attractions.
There are a few issues with the flat, as mentioned by others, there's a bad smell in the bathroom in the morning, the kitchen is much more basic than implied in the listing and we found the arrangements for collecting and dropping off the key quite inconvenient.
We enjoyed watching the local life from the balcony, but it is really tiny so don't expect to sunbathe out there!
Having said that, the bed was really comfortable and the a/c was really welcome as it was really hot when we were there.
Don't forget it's on the 4th floor and it's an attic, so probably best suited to fairly fit people who are not too tall!