Zero, Zilch, Nada.
He's an experienced, seasoned attorney.
I saw a case where the defendant wanted his guilty verdict overturned (or a new trial), b/c his attorney slept through most of the trial and didn't cross examine witnesses.
Said defendant did not get a new trial or overturned verdict.
The judge said the attorney was "competent."
On more than a few occasions media people have publicly asked the Peterson's what they think about their attorneys performance. They always answered that he was doing a great job.