Stylistically, Jim Webb (who was one of three candidates who were cheated on minutes) was one mustache away from running as Ron Swanson.
Martin O'Malley now knows what it's like to be black in America. Or, at least, what its like to be black and trying to hail a cab in America. (Excuse me. Anderson. Anderson. I'd like... Excuse me. Anderson.)
Bernie Sanders was very good. He did nothing to make any Bernie Sanders supporters unhappy, and came across as intelligent, sincere and far too sketchy on guns. He had the best laugh/applause line of the night -- "...the American people are tired of hearing about your damn emails" -- which elicited the only (partial) standing ovation from the audience. He's not a pacifist. He will not apologize for being a Democratic Socialist or a conscientious objector in Vietnam, and has worked closely with his friend and Vietnam vet, Jim Webb, on veteran's issues.
Hillary Clinton was very good. Tough, good-humored with well-prepared, substantive responses to to most of her points of highest vulnerability (Iraq). She appreciates Martin O'Malley's endorsement for President in 2008, blew a big kiss to Kevin McCarthy and was far too sketchy on trade and her cozy relationship with Wall Street criminals.
Anderson Cooper was enough of a pissy dick to everyone to be able to be called "fair" by his bosses.
Overall, the Democratic candidates comported themselves honorably and substantively.
Any Democrat should be proud to have this field to choose from.
And any America should be horrified that the alternative to the eventual Democratic nominee will not be an honorable and substantive public servant, but a demagogue leading a mob of imbeciles, bigots and lunatics.