Pros:
Roberto was nice and responsive on the phone when we were looking for the flat.
The flat is nice and the bed is quite good, consistent with the description.
He also provided very usefull maps of the area, and a list of shops & decent restaurants nearby. Among the list, those we tested were actually good, so we really appreciated it.
Several good ice cream shops are nearby.
The temperature was very high in Milan during our stay, so we appreciated the presence of a portable air conditionner in the bedroom, but some points could be improved :

Cons:
...the portable air conditionner in the bedroom is very noisy (impossible to sleep with it on, unless you have very good silicon earplugs, and you're a deep sleeper).
The shower didn't work very well:
1/ The water temperature would constantly fluctuate between cold and hot, with only a short time frame at the right temperature.
2/ The shower's water drainage was not very good either (partially blocked, or too thin?) so our feet would get underwater very quickly. Not terrible, but annoying.