ES4: Knights of the Nine - Review @ Grrlgamer

An enthusiastic review of Knights of the Nine is online at Grrlgamer.  There's no score but their opinion is obvious:

An already outstanding game is made even better through this ten hour quest which explores another aspect of the vast and fascinating world of Tamriel. If you've come to play through the rest of Oblivion, I command you, download Knights and add to your experience. It is quite worth it, if only to rediscover what you originally loved so much about Bethesda, and why we must keep them in our hearts and thanks during this Holiday Season.