I love Maltese so the fact that the main dog character was a Maltese was icing on the cake.
It was a very cute and fun movie. Obviously it's more for children and I think kids would love it. It didn't labor unnecessarily over the adults relationship and focused more on the dogs for the bulk of the movie.
I don't think that it was focused much on the holiday so I'm not sure I would consider this a Christmas movie outside of the fact that it took place Dorothea winter months. If there was much Christmas theme involved I can't recall it.
My main complaint is that it's almost impossible to find it to stream or find it for purchase.