I absolutely recommend Luana's place. It can get a little busy in the evenings, but is quiet overnight. Even in the evenings with the windows shut, there is not much noise. It's an easy walk from the train station and there are plenty of places to eat close by. Luana even has a list of some of her favorites to help guide you. She recommended a gelato shop just across the river and I second that recommendation! Florence is not a big city, so walking to other areas of interest is very manageable. If I return to Florence, I will be sure to look to see if Luana's place is available!