Pretty honest evaluation IMO. Outlines the sucesses and set backs.
The achievements in some other areas -- for example, in some particularly challenging Baghdad neighborhoods and in reducing overall civilian casualties, especially those caused by periodic, barbaric Al Qaeda bombings -- have not been as dramatic. However, the overall trajectory has been encouraging, especially when compared to the situation at the height of the sectarian violence in late 2006 and early 2007.
Letter (PDF file)