Really enjoyed this series. I will be picking up the rest of the Definitive Editions later. It was more serious spy stuff, post 9/11, from the British perspective, but not over the top like James Bond stuff (which is enjoyable in it's own right). The artwork was interesting, usually more cartoon like initially, but each book within the book had a different artist so it changed as it went. That was an interesting twist, which was nice and not at the same time, since I had to get to know the new visuals for each character. They were somewhat similar, but not exactly. I liked some artists more than others. 
 Had some good action sequences and the paneling was done really well. Overall, very good.