Clinton and Biden did well IMO, and the rest of the group was pretty average.
Richardson surprised me by saying he thought Byron White would be his ideal Supreme Court Justice. Byron White was one of the most socially coservative justice before retiring in 1993. I thought Richardson's choice was odd, but then when Williams wanted him to mention "someone of the living," he chose Ruth B. Ginsburg, who is the most socially liberal justice on the current court.
I don't think this debate will impact the race mainly because it is so far out from the primaries, plus there is less media focus now. I am a political junkie, so I love this stuff.