Well i cry at the end, because this were almost 11 years of my life and i am 17 years old, i loved this show, from the very first time i saw it.
This finale is ok, is not the great thing, because this is a big "Hey look who is here is "Catherine", oh!, how did "Brass" get here? who does know?, who does care?, i dont"
I believe this episode is still one of the better they had never done, because this episode remember me when the killers of this show were real people and sometimes real people are unknown persons with really creepy but "okay" reasons to do the things.
So yes, it was ok, because almost every single one of this themes was alredy touch before, CSI was a great show, the writers were great, so that is the reason why the show end up here, because the new writers and the new crew members never knew how to dont touch the alredy say and good things.
Catherine was the head of the CSI's before D.B.Russell enter the scene and she is know the head of the CSI, so this is like we erase that 3/4 years lapse of terrible seasons.
Grissom and Sara never need to comback, Sara should had stay were she was, that was good and really interesting writing, how Grissom was burn off by a serial killer that almost kill Laurence Fisburne and Nicky (Nathan "I dont care your last name because you was the worst serial killer of this show" was a great send off, that should had been the end of Grissom and Sara.
Catherine character should had stay, i know Marc Helgenberger wanna to leave the show, but she was the right one to stay in charge, see his daughter grow and see Nicky take charge of his own laboratory of CSI that was a great send off for the show.
See closure in Greg, D.B. Russell, Jules Finnlay, the hatefull Morgan and the lovely labs members, that is what i always wanna to see and sadly any of them had a good clear closure.