I've seen it.
It's very loosely based on a real case (il mostro di Firenze).
The murders are brutal (lots of gunplay which is a bit unusual but also some slicing up of victims) and I really liked the ending.
Btw The student whose researching the killer for her thesis reminded me of another film (Thesis...).
This has lots to offer to the giallo fan,some thrills and chills and some laughs (the club of voyeurs?).
A decent dvd would be welcomed.