Roberta's apartment is very conveniently located with Metro yellow line M3 Repulicca stop only 100 metres away, then is 1 stop only to Milan Central Railway station which is also walkable - 900metres to be exact. Many restaurants nearby as well!
Roberta and Luca are very nice hosts. Their children live outside of Italy so I am staying at their bedroom. It's a very cozy but spacious place I definitely recommend staying at Roberta's if you are in Milan!