The first series are probably the best. It becomes a little less interesting in the last series. But if you like the genre very much, it could be it manages toy keep your interest. I was never a big fan of it, so maybe I just got bored. Also, I don't like very much the acting of many members of the cast. But there are some actors that are considered very good here. It's just not my type of acting, I guess.
Good luck with it
