- Counterpart Comparison: The film is often compared to How I Met Your Mother.
- Fridge Brilliance:
- Will and Sarah/Emily not being "in-sync" with each other was emphasized a lot during much of their relationship. They became more "in-sync" with each other after their divorce.
- April is the one who made the Title Drop.
- Emily/Sarah is responsible for Will meeting Summer/Natasha, while Summer/Natasha is the reason Will was reunited (and later married to) with Emily/Sarah. However, none of them lead to Will meeting April, yet she is the person Will talked to before his proposal to both of them.
- When Will is telling the story, it was his daughter Maya who suddenly notices April, just like the way she (April) came in to his life unexpected.
- Fridge Horror: April's collection of copies of Jane Eyre with inscriptions in them. What if those books belong to people just like April? They might be searching everywhere for the book with their inscription in it because it means so much to them, but they'll never find it because April is hoarding them.
- Though maybe she plans on getting rid of them after she finds hers.
- Friendly Fandoms: Despite the Counterpart Comparison above, the film is well regarded by the HIMYM fanbase.
- Heartwarming Moments: Two, when Will finds her father's book for April (though he keeps it for years) and when Will reveals to Maya that he doesn't regret his failed marriage because she resulted from it.
- Hilarious in Hindsight: The ending of the film is remarkably similar to How I Met Your Mother's Grand Finale. The only difference is that there's no death involved.
- Ooh, Me Accent's Slipping: Rachel Weisz, a little, particularly in the "I've Got A Crush On You" scene.
- Squick: Some of Will's revelations struck some viewers as rather inappropriate things for a man to tell his ten-year old daughter.
YMMV / Definitely, Maybe
In the film: