In some ways the premise is common. It's a quest where the romantic leads work together to achieve a goal, in this case to bring back Christmas. It is a not so common subset where the quest is to restore some reality that has been changed, usually by a wish. In many cases, the lead is the center of the quest and has been given a new life. In some cases like this one, the entire reality has been changed for everyone, that is if you accept the reality of Santa and Christmas magic.
It takes a while to set up the quest. And enlisting Sam doesn't seem to be the obvious choice, but Erin needs help from someone. The romance development doesn't receive a lot of screen time and therefore it may seem like "falling in love" was rushed. Rachael Leigh Cook and Sam Page still manage to display some chemistry.
There is a strong thread that the meaning of Christmas is family and friends and love and spending time together. Also some stabs at Christmas commercialism.
There are a lot of good lines. I typically don't laugh at lot at movies but I found myself laughing out loud a few times especially early on. The acting is good if you allow for some necessary silliness. I think RLC has good comedic timing.
My title says "Clever". I thought this was shown in imagining of the results of trying to get people to celebrate a Christmas that they have no basis for. Tennis balls for ornaments is just a small example. Or the mom complaining about what Erin was telling her kids which was actually kind of creepy.
