I was disappointed too.
If the original is one of your favorites, I think you'll be disappointed in this remake.... Rent the original.
I like Jeff Daniels and Patricia Heaton, but, as the previous poster said, there was just no chemistry. The story is still good - as only a Neil Simon story can be - and the acting was fine. There just wasn't much believability to it.
I think it was a risky remake, especially on Jeff Daniels' part. That frantic/crazy/funny part won Richard Dreyfuss an Oscar for a reason.
The both looked like they were going through the motions and I did not believe that the two of them would be "together."