Luiz is a very helpful host - he provided us with some useful recommendation regarding places to eat, see and how to travel in the city and to the towns nearby. We've even received map with these information. The communication was great - Luiz answered all of our questions almost immediately.
The flat isn't located very near to the city center but it is about half an hour on foot and it is also easily accessible by public transport. There are two railway stations near to the apartment, which enables to travel to other towns with no problems. The flat and the room are quite comfortable and big. However you should be prepared for some waiting to the bathroom and the room could be cleaner. Anyway good value for money.