Well I would not really recommend this movie to anyone who doesn't like Robert De Niro, Katherine Heigl, Diane Keaton, Amanda Seyfried, Topher Grace, Susan Sarandon, or Robin Williams. This is actually a great cast to have together for a movie. But this movie has what I like to call "Forced Comedy." This is were the writers (of the movie) sit down and write up funny situations for the movie, but making it to forced at you.
Another problem with the movie is it had old lady comedy. As to the point, The audience members in the theater were all old people. Not a good sign for a movie. The movie was really predictable.
I would recommend waiting to see this one on Visual Image. What's Visual Image you say? Well in the future when your old, that's how people will watch movies in their home. So watch this when your older then time, and you'll laugh at all the jokes and want to watch it over and over.
What I would have changed? (Spoilers)
Well for starters I would have had different writers. Ideally with this cast you need to focus on comedy that's out of the box. Pushed the actors to do new things. Also I didn't like having to read the sub-titles. I would have changed that in a second. This movie also lacked in Robin Williams. I would have added him more in there and not made him a priest. I feel that took away his comedy he could have done.