My initial impression was the similarity with Maggie's Christmas Miracle. This movie uses flashbacks several times to fill in backstory of Joan's history especially related to Beau. It's not a common premise and despite the similarity there are definite differences to the afore mentioned movie. We wait to almost the end of the movie for the revelation of the mystery that has been hanging over the whole movie. It is not something predictable. The ending is touching.
Catherine Bell and Mark Bellemy had chemistry but Joan kept damping it with a combination of ghosts and wanting to preserve Liam's memories. Then all of a sudden, without enough transition, Joan lets herself fall into the spirit of the relationship.
There are things that are blown out of proportion for the purpose of advancing the story. It doesn't flow naturally, or to put it differently, too much of it is contrived. Love at first sight is the holy grail of this kind of movie. That theme is treated in an interesting way in this movie. It is definitely unusual and in that sense sets this movie apart. However it didn't sit right with me.
If you expect realism in this kind of movie, you're watching the wrong kind of movie, but the crisis that threatens the ceremony and its solution stretch the envelope too much for my taste.
As I've mentioned more than once, there are some interesting and unusual things in this movie. I think the acting and production are done well. The fact that I didn't care for how the story developed doesn't mean that others will feel the same.