Pretty terrible. These things are supposed to be debates, not extended hostile interviews of Hillary Clinton with Sanders and O'Malley occasionally allowed to join in.
It must be rough having the moderator not be a total Hillary hack.
It must take a lot of mental gymnastics to not CLEARLY see that the moderator was hostile to Hillary Clinton much moreso than the other candidates. Now, maybe this particular bias makes you happy so you'll overlook it, or you can justify it by her being the frontrunner or something, but it's ludicrous to deny it.