Nothing is sacred in this installment. Every topic from paedophilia to miscarriage is covered in the typical Saw way. Is it a cutting edge social commentary? No, its for people who aren't quite confident enough to try a snuff film.
the one constant of the Saw films remains; shoddy straight to video style acting. The guy who plays Hoffman must've attended the same acting school as Keanu Reeves, Taylor Lautner and Sam Worthington. More wooden than a 2x4.
That said, its not atrocious. That comes later from what I recall...