Then you're in for a real treat. Castle and Beckett are the best team since Turner and Hooch (remember that I said that. It'll be important later) The actors seen to have the same sort of instant rapport that their characters do, and it is a delight to watch. About the only thing that seems a little too good to be true is Castle's daughter, but you'll have to see her to understand what I mean.
Just a warning: The show is highly addictive. Watch at your own risk.