What otherwise might have been a decent but routine plan-an-event type of ROM-COM, warranting a "6" review score, becomes elevated to a "7" because of the lead characters' interplay around their respective, and partially shared, backstories. Tracy and Hepburn its not, but this adds spice to the story. Then the movie rises to become a very memorable "8" by the addition of the most charming Santa look-alike since Edmund Gwenn's portrayal in 1947's "Miracle on 34th Street". The Sleigh, itself, gets an honorable mention in a supporting role. I agree with several other User Reviewers who recommended hanging in there through a slow start and some awkward dialogue early on. I think you'll be glad you did.
I've thought about this film a number of times since I first saw it years ago, and it grows on you with time. That qualifies it to be included as a "Hidden Gem" on my IMDB "Christmas Movie Favorites" list.