This is a very great series. 4 was my first Way of the Samurai game.
I really enjoy the customization aspect of this game. If you are interested in creating your own move sets, this game has that. Forging your own sword is another feature I enjoyed.
The music is phenomenal, Noriyuki Asakura did an awesome job. If you have never played this game, just know he also composed the music to Tenchu.
Playing through the many scenarios was really fun. I enjoyed this game a lot.