This is a nice flat and bigger than the photos suggest, though the kitchen is quite small so not suitable if you are intending to do a lot of cooking. The neighbourhood is residential and a welcome respite at the end of the day. It is in a cul de sac so not generally noisy though there is parking for motorbikes below so a bit of revving - though the night was fine. It is also close to both a small and large supermarket and a friendly restaurant. We would recommend also shopping at the central market for fresh fruit, nice bread and olive oil. Its about 20 mins to the main centre.
Barbara and Marco were very helpful, meeting us when we arrived and keeping in touch by email. They had helpful suggestions for places to visit which we would recommend you try.
One tip - don't even stop for a coffee within a kilometre of the Duomo - you will get ripped off, and its only 10 mins walk to find a bar or sandwich shop with local prices.
We would definitely recommend Books Corner to slightly more adventurous couples.