I have stayed at Luisa's place for three nights. She welcomed me very kindly despite my late arrival. I really enjoyed the furbishing and decoration of the room. The place is not very central, but you are still within walking distance of the university and the Lambrate metro station so it is OK. Be aware that you will not be able to use the kitchen, though. All in all, this is a place with very good value for money if you intend to stay in Milan for a few days.