What is the movie couples retreat about?

Couples Retreat follows four couples on a destination marriage retreat in an attempt to save their relationships. The film features Vince Vaughan, Malin Akerman, Jon Favreau, Kristin Davis, Faizon Love, Kali Hawk, Ted Bateman and Kristen Bell coming together as the four troubled couples. The film also features Peter Serafinowicz as resort host Sctanley (pronounced "Stanley").