We enjoyed our stay immensely on Via Cosseria. The apartment was located in a good area with the Supermarket Esselunga within walking distance. The Duomo is within walking distance , about half an hour. San Lorenzo market is similarly located and if you Iike browsing around souvenir stalls then it could be fun. There are many stores in the vicinity too worth looking into for leather goods; shoes, purses, jackets etc.
The weather was wonderful and we only experienced a thunderstorm once. I would definitely recommend this apartment.