Patrick wrote a review of Shimano Ultegra CS-6700 Cassette on October 14, 2013
Familiarity: I've put it through the wringer
I think I've said this before on other items but its true: Its Shimano! its going to be awesome. I've ridden Dura Ace, 105 and Ultegra and for the money Ultegra wins hands down. I went with 11-28 for cross season.