In my opinion:
Lee, Casey and Tim were the best of the night. Even though he sang it well, I was disappointed in the song Casey picked. There had to be a better song out there for him to sing. I hope his selection doesn't hurt him in votes.
Crystal and Katie were OK
Aaron and Siobhan were OK to a much lesser degree
Andrew and Mike were just terrible. I don't get what the judges heard in Mike. I think he did a terrible job in changing In the Ghetto. By taking all of Elvis' deep voice sounds out, Mike changed this into a trite song. Didn't like it at all.
I thought that Adam did a great job mentoring. Good advice. I don't get all of the comments about needing to help out Adam's career. I don't follow sales charts but he must be doing better than last year's winner. I actually hear Adam on the radio, hardly ever hear Kris. I would like Kris better as a person but Adam has the voice.
Also, big cheer for Jason Castro's album. He is still my favorite (sorry all of you David Cook fans) and I hope his album sells well.