The fast-spoken dialogue is well-written. On a structural level, though, one might wish that the characterization had been as wonderfully eloquent as the exchanges between the otherwise memorable personalities. I rarely complain that a script is too carefully controlled but when the overall impression is one of constructedness (expositional trait descriptions invariably confirmed by character actions etc), it can become a bit of a problem. Watch it anyway, but only if you like your dramas talky.