Hope you're with the one you love this fine day.
The critics didn't like this much (29% on the Tomatometer), but I thought it was OK. I dimly remember seeing the 1972 version, and I remember not liking it so much. However, my movie tastes may well have changed in the 36 years between seeing the original and the remake.
The general plot is the same: young man gets married, becomes disenchanted with his new bride almost immediately. During the honeymoon, he meets and falls for someone else, and most of the movie concerns the humorous/sad details of the resulting romantic trajectories, deceptions, and misunderstandings.
Details are a lot different though. This version is directed by the Farrelly brothers, which means that it's (to quote the MPAA) "Rated R for strong sexual content, crude humor and language." Elaine May directed in 1972, so I wonder how she feels about that.
Fun Fact: in the 1972 version, Audra Lindley—Mrs. Roper from the old sitcom Three's Company—played the mother of the groom's new love. Here, the corresponding role is played by Polly Holliday, Flo from the old sitcom Alice. Inspired casting!