Order of the Phoenix, as a movie on its own, was good, but it was. TOO. RUSHED. Like wth, the scenes felt like they were fast forwarding at breakneck speed. 6.5/10 for considering it as a movie.

As an adaptation of the book however, IT WAS TERRIBLE. Like the 4 movies before it. I understand there's time constraints, but at LEAST FOLLOW THE SCENES OMG.
-Cho wasn't the one who spilled the beans on the DA to Umbridge
-Umbridge only used Veritaserum on Harry, not the ENTIRE SCHOOL
-Dumbledore didn't simply clapped his hands on Fawkes and disappeared
-Sirius wasn't the one who gave the previos OotP's photo to Harry
-There were alot more rooms after the door through to the Department of Mysterie
-Bellatrix Stupified Sirius and he fell through the veil, she DIDN'T CAST Avada Kedavra!!!

and many many more. -shakes fists-

Since the 7th book is out tmr, I'll just allow myself to say this.
I was WTFing when Voldemort was fighting Dumbledore in the Ministry of Magic,  because Voldemort seemed to have casted (spoilers below)
(spoilers end) I doubt that it's the real FF however, the producers probably just decided to shape the gigantic flames that Voldemort sent out.
As an adaptation, the movie warranted a 4/10.