Actually, I thought the movie was kind of trite. The acting sucked, the characters were shallow, and the effects amateurish. But the story was pretty accurate historically, and there was nothing PC about it.
It has inspired me to learn more about the event, and especially about Jan Sobieski, who pretty much saved the day, and by extension, Christianity.
I love the subject and have read a number of books on the Ottoman Empire as well as the Byzantine Empire. Many historians consider the failure of the Turks to take Vienna as the beginning of the decline of the Ottoman Empire—though it still lasted nearly three more centuries.
As to the movie: Terrible on just about every level. The acting was subpar, the VFX weren’t very special and the battle scenes were just a few stunts shot from multiple angles. If you look up the credits for the writer and director, you can see that they are not much more than amateurs.