The movie starts really slow ,, not much comedy to laugh at ,, but the plot grows gradually until it peaks after the swimming pool "adult beginners" thingy. The screenplay is just okay ,, the writing seems to be getting involved much more with the drama than it is with the comedy ,, not much excitement or unpredictability, you can easily know where things are going in the movie. Honestly, the trailer was kinda misleading with all of these funny bits which seem to reflect the 5% comedy in the movie.
As for the cast, Nick Kroll and Rose Byrne performances was fine they reflected the depressed newly parent pregnant woman and post- failing business guy. For me ,, and as a supposedly comedy movie,, the scenes with Jason Mantzoukas, Bobby Moynihan and Joel McHale had much more comedy and "giggles" than the leads.
Overall,, the movie wen just okay,, for me it deserves no higher than 5 as a rating the IMDb average rating by 1,518 users is 5.5 which seems close enough ;)