I've lived in Italy for well over 10 years, and have been following socio-political aspects of the country since 2005 - when I started to blog about Italy (Italy Chronicles is the name of my site in case you want to see what I know/write about). I thought Ginsborg's book was pretty much spot on in its analysis and description of how Italy has evolved into what it is today.
Ginsborg's book provides its readers with extensive insight into contemporary Italy - the country has more or less remained static since the book was first published.
Moreover, I believe those about to do business in Italy or about to work or move to Italy will find this book helps them prepare for what they are about to face - they can then adapt accordingly.
I would actually recommend reading this book twice! Once before people come to Italy, or shortly after they have arrived - and then once again after 5 years or so - by which time Italy's more frustrating aspects may have started to have, how can I put this, er, lowered morale.
It is an academic text, which means it is not always that easy to read - but persevere! The only thing I did not like was its length - I thought it was a little on the short side and felt a little more background could have been provided on Italy's main players - hence the 4 stars and not 5.
Still, I would not hesitate to recommend this book to others.