Don't go if you don't know the background of the film. You will miss so much if you do so.

Rating: 9/10 (8 June 2016)

Every single critic post starts as: "This World of Warcraft film is like Lord of the Rings but worse. Worst movie of the decade". Stating that it is a WoW movie, and not a Warcraft movie, makes it clear that the critics had no knowledge about it (they also end up saying that those who are not fans will get lost). Well, the movie is not for newcomers. You need to know who is Thrall, which are the specific locations of the world, who is every orc and what is that murloc that appears for half a second to truly appreciate the movie. This isn't made for all the audiences, obviously. It is made for the 12 million users of Wow and all the Warcraft I,II and III fan-base.
So, if you like Warcraft, go see it. It has some cringeworthy moments and some mistakes in the plot, but it is very good nevertheless. If you are new to this genre, search for information beforehand, or make a friend tell you what is going on without spoilers.