It's nice to see an actual adaptation of Macbeth for once. The acting is all up to standard and directing all seems decent.
This adaptation finally takes the Macbeth script literally as opposed to throwing it around and putting it into whatever setting they can think of (Drug lords? Vietnam? AN ESTATE IN BIRMINGHAM?), not that this determines it's quality but unlike Romeo & Juliet I don't think this story works in different scenarios.
It's also worth mentioning the modesty of this version - like the play, we never see the violent killing of the king, just Macbeth returning from the room, blood on hands, with the line "I have done the deed". Again, a stabbing scene doesn't determine a bad movie but the modesty of not including one when it would be so tempting to is admirable.
You won't find hundreds of old, naked witches here, nor will you see blood splattering all over the walls (They showed us that BBC adaptation when I was in school, and called it educational! Try showing a modern story with that amount of blood and nudity to kids and you'll find yourself in trouble), you won't see football hooligans, Vietnam soldiers or drug lords, this is just pure Macbeth. It may not be perfection, but it's satisfying.