I'll just start by saying that i'm really glad i grew up with these games.
This is of course the crown jewel of the trilogy, as everyone knows. Even people who didn't play these games can recognize the characters, and most likely heard the amazing music.
Despite getting a little more silly than the games before, this game puts the characters you grew to love through some real challenges and lets you see them from a more personal, vulnerable angle - climaxing in a last case which is a nuclear explosion of emotions and a worthy send off to the three games.
I sincerely recommend the entire trilogy to anyone with the patience to do all of that reading and objecting, it's really worth it.