I've had the pleasure of spending three nights in Piero's house, and I must say that it has been one of the best AirBnB experience I've ever had.
The room accounted for the entire third floor of a stylish loft, with its own ensuite bathroom, and so much space that you could basically stay inside and still go for a jog. The bathroom looks brand new, and the rest of the place sports top-notch finiture and a gorgeous internal garden which is actually smaller than the place you're renting. The kitchen is nice (I did not use it) and the loft itself is located inside a quiet court. If you're into good looking buildings and interiors, then that's the place to go for.

Piero and his wife have been helpful while not being intrusive, which along with the sheer size of the place really let you feels like you're renting the entire loft.

The loft is located minutes away from a tram line going directly to the city centre via the Navigli area (so lots of bars along the way), and to local transportation to the closest underground station, which can be easily reached walking anyway.

The pictures really does not make justice to the place, and the only thing I would be wary of is that the place might not be the best options if you have mobility problems, given the width of the internal staircase.