Jonathan Taylor writes:

Out of all the same-samey coverage of the recently published volume of Susan Sontag's early journals, Reborn, this characterization by Luc Sante stands out to me: " 'Reborn' is in some ways less like a normal book and more like a person." He continues:

....it is consistent in its deepest reaches, but subject to enormous mood swings. Some very large matters are barely glimpsed, whizzing by at terrific speed, while sundry smaller ones are examined in exhaustive detail. Motives often have to be guessed, and important players enter and exit summarily, without introduction. Various opinions and exhortations—or crotchets or tics—are repeated to the point where it takes a great deal of good will or simple affection to tolerate them. But Sontag does successfully elicit the reader's good will and affection.

By the way, Sante's 2008 collection Kill All Your Darlings contains a Talk of the Town piece he contributed in 1988 about the Tompkins Square Park riots, complete with amusing footnotes about how it was changed by the editors.