"If you're thinking that there's nothing more interesting than millionaire hitmakers emerging from behind the boards to antagonize each other in song, then "Shock Value" is for you. Otherwise, the only shocking thing about the album is just how uninteresting it is, given Timbaland's considerable creative talents and the CD's star-studded guest list -- an A-list lot that includes Missy Elliott, 50 Cent, Fall Out Boy and Elton John, along with Timbaland's favorite current collaborators, Justin Timberlake and Nelly Furtado.
...
He sings a little bit, raps a little more and even grunts some on "Shock Value." But he's faceless throughout, with no real presence. Just as some broadcasters have a face for radio, Timbaland has a creative streak that's best suited for the control room.
The album's most compelling tracks are the ones in which he either manipulates his vocals or mostly cedes the microphone to his guests. "Release," for instance, is an absolutely filthy electro-funk workout, complete with more cowbells than any track this side of the Blue Oyster Cult catalogue, and it features Timbo barking silly lines in a quavering, crazy voice that would make Bootsy Collins proud."

And here is a link to the full review, http://www.washingtonpost.com/wp-dyn/content/article/2007/04/02/AR2007040201682_2.html?nav=hcmodule from the Washington Post.

Mike