Ana's flat is lovely and in a great location - we didn't use public transport at all apart from the airport and going to Belem! Ana sent us some great recommendations for activities during our stay and the flat had lots of leaflets (in various languages) which previous guests had left which helped us find new things to do.
We were also able to drop our bags off before check-in, meaning we could explore the city as soon as we arrived and Ana offered to keep them after we checked out if needed which was really helpful.