I enjoyed this gore-fest but not as much as SILENT NIGHT DEADLY NIGHT from the mid-80s.
I think this 2006 Black Christmas is a remake of a 1970s original which I haven't seen so can't compare. Not sure if the 1970s film was so female-dominated or if that is a pc modern angle.
It's all the usual psycho stuff - with lots of 'grand guignol' gore to satisfy the kids - and a couple of real jumps too. I find this sort of thing funny actually - these movies must be fun to make.
Predictable plot and a rather damp squib fizzled out ending (no spoilers).
Worth a watch, certainly, if you're into horror at Christmas.
BUT what is wrong is how they get the song credits wrong at the end - traditional Christmas carols were NOT written by anyone we know usually. DECK THE HALL is based on a traditional Welsh carol. Modern musicians may arrange traditional songs BUT they do not write them.