I've always been very mindful of the casting as they impact the overall delivery of the show. In this film's case, they're just brilliant.
Casting may not be stellar, and yes, Cameron and Kay may not have that romantic chemistry a lot may have hoped for but guys....even without the romance, the show can hold its fort just well.
This is an interesting read that combines humor and wit in an easy-to-follow storyline. It's that type of book that you can finish in one sitting and that which can be hard to put down once you get yourself at ease with Christopher.