I love Grandpa DeNiro, he is one of the great actor ever alongside Dwayne Johnson and Vin Diesel. But my expectation is too high from this movie, I thought it will be funny, my bad for not checking out the rating first because I don't like to do that for not spoil the mood. But yeah, Grandpa DeNiro did not fit with the role as a crude comedian. At first, I think every joke don't fit with non-American people, I'm from Asia by the way but I guess all the laugh we heard is the believable fake laugh by the hardworking extras who they paid to laugh. I agreed with other reviewer that said that this movie is lifeless, it have no soul. Its just like some dry salted fish, I never laugh at all even tho I laugh so hard with other American comedy before. Its too long & unfunny. 3* for hardworking DeNiro, Mann-Apatow & all the extras. I just don't get it. Sorry.