Jack coming up with metaphors was a great little recurring gag for the episode. It reminded me of the segment on Important Things with Demetri Martin where the host would create new expressions.
Megan Mullally: She's not funny on Party Down, wasn't funny on Will and Grace or In The Motherhood and she wasn't funny here.
The Nina storyline: Kind of funny, albeit predictable. If you have seen this episode multiple times like I have then it probably will be less funny in your eyes.
All in all just a decent episode of Just Shoot Me. There are many better ones out there.