Warcraft fans will love it.

Rating: 7/10 (10 June 2016)

First off, I'm going to address the reasons why people hate this movie. Simply put, it throws you in the deep end of a complicated and involved mythos and expects you to either go with it, or gtfo. There is precious little in the way of explanation of who the characters are, why they have the motivations they do, or how they all interact with one another.
In short, if you know something of the lore around the Warcraft game, you'll be a lot happier than someone who knows nothing. Most of the negative reviews seem to come from the latter camp of people, and for that, I can, for once, hardly blame them. After all, plenty of people who had never read the Lord of the Rings enjoyed the movies of that franchise without any prior knowledge of Tolkien's world.
So in essence, what I am saying is that Warcraft does a poor job of explaining its world an people.
That said, I think this was always going to be a film that would be appreciated more by the fans of the games. I include myself in this group and I can honestly say I found it enjoyable. The bright colours and larger than life characters may not be for everyone, but for game fans, there is little to complain about.
Characterisation is a bit thin. Again, the movie expects you to know a little about the players in its universe before going into it. It is effectively hoping the game has done all that pesky familiarisation for you, allowing you to just enjoy the plot.
As for the plot... well, it details the arrival of the orcs into Azeroth and the ensuing conflict that arises with the existing races. The orcs are somewhat huge in comparison to the humans and the action does a good job of getting that strength across visually.
Effects-wise it is something of a hit-and-miss affair, with some of the facial CGI being amazing and some of the mass battle effects looking weak. Likewise, the sorcery and magic effects are very well done. Overall, however, there is nothing too bad to complain about, and the balance is definitely on the positive side.
Dialogue is at times decent, occasionally laughable and sometimes dire. No one will win any awards for this but there are enough moments of genuine humour amongst the verbal clangers that it somehow manages to overcome the writing deficiencies and veer into cheesy-goodness as opposed to direness.
So what you have is an action-fantasy story with a deep background that most average folks will never understand, coupled to thinly developed characters and a plot of world domination that wouldn't be amiss in a 30's serial.
Yet, somehow it manages to work. Maybe it is because I have that background knowledge, or maybe Duncan Jones has managed to make the impossible work, but Warcraft is an entertaining movie to watch. It won't win any awards, as I already said, but it kept me watching to the end, which makes no sense when I consider all of the component parts individually. But as a whole, it is definitely greater than the sum of its parts.
Is it worth your time? Well that depends on whether you are a fan of the games or fantasy in general. If yes, then I'd say give it a go, and ignore all the critical reviews that slam it. Make your own mind up. If you are not such a fan, you might find it confusing and simplistic and not very satisfying.
SUMMARY: Mostly for Warcraft fans. Lots of weak points, but yet manages to work in spite of this. If they make a sequel, I'll go see it.