I smiled at Leonard's costume but since I laughed at it last week in the preview all it got was a smile during the actual episode.
The after party scene saved the Lenny plot, but I just didn't buy it. I usually love Kaley's acting but she really phoned that scene in. It just didn't come across as sincere. She seemed to just be reading cue cards.
I was disappointed in Howard's Sheldon impression I expected Simon to nail it but he missed it by a mile.
The Raj/Anu, Bert and Stuart parts were purely filler and contributed nothing to the episode.
The Howardette and Shamy plot wa