Suspend your disbelief. Enjoy the appealing Emilia Clarke. Enjoy hearing George Michael sing. It's weird, it's quirky, and it may force that a little bit too heavily, but for those who like not knowing where something's going, but who like to go along for the ride -- who like Christmas scenarios and colors and decorations and music, and like Wham! -- it's a fun sweet gut-punch, joyful movie. I usually can tell what's going on immediately when someone tells me there's a twist in a movie. (In the Sixth Sense for example I knew that one within the first couple of minutes)
There's not only a twist, there's a special Easter egg/cameo that will tickle people familiar with 80s music. Watch for it...
Just let go and enjoy -- it's adorable.