Rather unoriginal, though the cast make it more likeable than it would otherwise be.
'Yes Day' is exactly what it says on the tin, you will not be shocked to find out what the plot is. It plays out in the most predictable way possible, even the hearty moments are a little too sickly at times. With that said, there are some minor decent bits.
Jennifer Garner (Allison) and Édgar Ramírez (Carlos) work well enough together, though Garner definitely stands out more. Jenna Ortega (Katie) does alright in her role, one that isn't too dissimilar to Isabela Merced's in 'Instant Family' - as is the whole film, in actual fact. 'Yes Man', ft. Jim Carrey, also holds slight similarities as you might expect. Both those films are far better, fwiw.
Not one I'll be revisiting, but I could see families in particular having a fine time with this. Each to their own, of course.