This is a mindless comedy. Lacks logic, lacks sense but would make you laugh for sure.
Most of the heavy lifting was left to Kapil and he tried and tried very hard. Even his one liners was not enough to save this movie. Even if everyone had given an Oscar wining performance, this would still be bad nonsense movie. At times it would be those one liners that would make you re-think of not leaving the theater halfway of the movie.
Let me tell you one more thing that would help you to decide if you should go for this.
Have you seen "Sajan chale sasural" ? If yes, you've seen the best movie of this genre. Have you seen "Garam Masala" (Akshyay and John)? If yes, you have seen the crappiest movie of this genre.
"Kis kis ko pyaar karu" falls in between of these two.
It's bad, it's nonsense but could just make you laugh those two and half hours.