Martina's bnb is close to the train station which is a big advantage considering you will have to carry your luggage at every bridge ( Venice is a city of canals and it is interconnected by small bridges). It is a shared apartment ( bathroom is also shared) which was not a big problem. The bus station is also close to the BNB place incase you are going to fly in or out of Venice. We could not meet Martina but were able to use her bnb place with the help of her clear cut instructions on bnb and messages.