Here is a snippet:
"Vonnegut, who failed at suicide twenty-three years ago, said thirty-four years ago that he hoped his children wouldn't say of him, when he was gone, that he made wonderful jokes but he was such an unhappy man. So I'll say it for them."
Gal Beckerman of CJR, has a take on this.
Since Vonnegut's not around to provide his own assessment of Rosen, I'll happily do it for him: *
(For the uninitiated, see Vonnegut's "Breakfast of Champions.")