I think it's a fairly good representation. It's faithful to the chronology; the first 10 minutes of the movie and the last 10 minutes are the same.

One thing that strikes me as off, however, is Cobb's length of time spent in Limbo. It's only slightly shorter than Saito's yet as far as the audience sees, Cobb only spends a brief amount of time there to find Saito, as evidenced by his relative lack of aging.