I've heard a lot about Berlitz, both good and bad. However, I emphasise that it is just all hearsay, and it's because of this that I'm starting a new job with them in Beijing next week.
They use a method with emphasis on speaking and using only the target language. How strictly this is enforced depends on the school, from what I know so far.
I'll keep you posted on how things go with me, but I recommend you try searching Dave's ESL cafe as there are a lot of posts about Berlitz on there, or you may find someone working at the school in Rome.
Hope this helps,