We loved everything about this hotel, with the exception that the Michelin star restaurant is closed in August and didn't reopen until the night we had to leave.
The location is terrific (adjacent to the Duomo and shopping arcade, 5 minute walk to the castle), the rooms are modern and clean. The cocktails at the inside/outside bar are expensive (18 Euros) but they come with a 'free' three course tasting menu of appetizers in addition to the olives and nuts that are ubiquitous. At first we thought we had ordered dinner by accident but after figuring this out, we went back every night. Sitting outside, having cocktails and great apps is a great way to spend an hour (or two) in Milan.