I love this movie. It is absolutely hilarious. Out of all of Schwarzenegger's family flicks, this is the best one. Arnold actually tries a little harder to be funny than he usually does, and it shows. Christmas movies always have to be memorable and contain a bit of heart, which this totally has.
Arnold and Sinbad have hilarious chemistry and, along with Phil Hartman, make Jingle All the Way one of the most enjoyable and hilarious holiday movies that will always be a staple for me.