Hi,
I cannot fully answer to this since I am not Italian or familiarized with Italian national accreditation system nor a specialist in other master degrees but in terms of MBAs, I have done some research by my own when looking for my MBA and I can share some thoughts.
So, as I've seen from your original post, you are definitely interested in doing an MBA and you want to work and live in Italy, right?
In terms of MBAs, there are three important (that counts) accreditation bodies in the world: AACSB (USA), EQUIS (European) and AMBA (UK). There are many debates about which one is the most important but this is not the scope of this post.
the idea is that if you have at least one, you can claim you are an accredited scool (or program in case of AMBA).
Now, looking at SDA, it has all the 3 so, from this point of view, your MBA will be recognized all over the world.
Having a quick look at SDA's web page, I've noticed the accreditation page (below)
http://www.sdabocconi.it/en/about/quality-accreditation-and-benchmarkingAs long as its director's email address is available, I suppose you have a big chance of getting a feedback if you express your worries about their accreditation. Check also the new Italian degrees (prior and after Bologna declaration) .
http://www.study-in-italy.it/study/new-degrees.html Moreover, as a guaranty of their quality, if you check their exchange program, you can see prestigious universities / business schools like LBS, UCLA, HEC Paris, Tuck and Wharton just to name few of them which considered SDA (which is the business school tied to Bocconi University). Note that these schools are quite selective when choosing their partners for MBA education. Please find the entire list below:
http://www.sdabocconi.it/en/mba-executive-mba/full-time-mba/program/international-exchange-program#contentOn the other hand, if you look at the rankings (for me the FT and Forbes are the most relevant), you can see that the SDA is the only Italian school ranked in Top100. The one from "The Economist" is also useful to collect important information about the program.
http://rankings.ft.com/businessschoolrankings/global-mba-ranking-2013http://rankings.ft.com/businessschoolrankings/sda-bocconi/global-mba-ranking-2013#profilehttp://www.economist.com/whichmba/sda-bocconi-school-management/2012http://www.forbes.com/pictures/eidm45edgd/4-sda-bocconi/Finally, if you have an MBA from SDA, you don't have to be worry about what some people say because the prestige and value of the MBA can open some important doors for you in Italy and this is what it counts. The right people are aware of what a MBA from SDA mean, you can bet on it.
Personally, if I would have the same goals as you, I will seriously consider SDA, even compared to other top business schools of the world.
Regards,