I kind of liked it mainly because of Michael Douglas.
And So It Goes is a flawed comedy/drama. But yet there were still several times where Michael Douglas' character had me laughing. He seemed to have fun with the role.
Fans of Michael Douglas and/or Diane Keaton still might enjoy the film even if it's getting trashed by most critics. I'd recommend it at least for a matinee or video rental. It's not great but Hollywood has put out far worse.