Italian language courses? (Rome)

Hello!

I've arrived this week in Rome and I would like to attend an Italian language course.
Now, I imagine that this question has been asked a million times before, but...
can anybody recommend me a good course or school?

I'm looking for (at least in the first months) for a quite intensive one, with a
structured way of teaching ( textbooks, grammar, .... ).

I've searched on internet and I found a lot of private schools (that are quite expensive)
and before I invest that kind of money, I would like to know if they are any good.
Does anybody have some experiences with this?

Thanks in advance!!

Shanna