This is a really great Christmas episode. There is a lot of humor and a surprisingly dramatic climax.
First off, Buddy Hackett and Soupy Sales are hilarious. It is a blast watching them play mobsters!
Lonnie and Eric's storyline is hilarious, too. I wish that Lonnie had been in more episodes. She and Eric play off each other perfectly.
The dramatic climax where Shawn chooses to not deliver the box is very well played, and this whole scene really ends Shawn's struggle to be a "bad boy." Sure, he still pulls some pranks (like in the very next episode "B & B's B'n B"); but we know that he's not going to spend the rest of his life blowing up mailboxes. (See episode 17, "The Fugitive.")