I cannot bring myself to give a star rating to the personal, never-meant-for-publication journals of the sixteenth emperor of Rome. These notebooks are the result of Marcus Aurelius' practicing of the Stoic exhortation to maintain one's 'command centre;' he reminds himself, in many cases repeatedly, of such central Stoic ideas as living in the moment (rather than dwelling on the past/future), valuing only what matters (justice, honestly, being a good man), understanding that those who do wrong cannot help it (but can perhaps be corrected so as not to be misled by their own false beliefs about what goodness is), and maintaining control over one's reaction to one's fate. 
What I will mention (from the standpoint of someone with an academic background in philosophy) is that Robin Waterfield's presentation of this material is excellent - well annotated, clear, readable, and with a substantial bibliography. If Stoic ideas interest you, I would absolutely recommend this particular translation.