Lisa's place is obviously a top location! A couple of staircases down and you're at the river. If you're too tired to take the stairs up, you can take the funicular or make a short detour via f.i. Rua das Rosas and the railway station, almost round the corner. Trains from Sao Bento to Guimaraes and Aveiro are frequent and very cheap. Metrosystem is interesting too!
Tourist Office is round the corner as well, next to the cathedral. And in the evening the local Guindalense bar under the medieval wall, is waiting to offer you fresh drinks and... an amazing, spectacular view on the bridge and the surroundings!!
If you have practical questions about the flat, Lisa and her assistant Sonia are ready the help you at any time!