At an upper-intermediate level, you can understand the main ideas of complex Italian text on both concrete and abstract topics, including technical discussions in your field of specialization.
You can interact with a degree of fluency and spontaneity that makes regular interaction with native speakers quite possible without strain for either party.
Finally, you can produce clear, detailed text on a wide range of subjects and explain a viewpoint on a topical issue giving the advantages and disadvantages of various options.