'I Do … Until I Don't' is like vanilla cake: Sweet and light

"I Do … Until I Don't" is like vanilla cake. It's sweet and light if not memorable. There's nothing that new in the script examining marriage as a tradition. What writer/director Lake Bell has cooked up would be a sufficient serving of cinema if the debate was the only ingredient. What gives her recipe for romantic fun a flavor boost is a first-rate cast that includes Ed Helms, Mary Steenburgen, Paul Reiser, Amber Heard, Wyatt Cenac and Dolly Wells.