Knights of the Nine is a "means to an end" add-on to a vast game. With a couple of exceptions (most notably Fort Bulwark), I didn't really get a lot of enjoyment out of playing through it thanks to all the busywork. However, for the person who is in Oblivion for the long haul, the rewards of doing this expansion justify the tedium. Regardless of whether you're into bladed or blunt weapons, you'll get a great one to go along with excellent armor which will be either heavy or light, depending on which type you're more proficient wearing. In other words, it's a longer version of one of those annoying sidequests you always feel compelled to do simply because the treasure is so good that it's all worth it in the end.