Jeffrey S.wrote a review of Shimano Dura-Ace SM-BB9000 Bottom Bracket on December 14, 2016
Familiarity: I've used it several times
Super smooth and lightweight. Shimano does a great job with so many products. Their BBs and chains are definite bargains. I have a couple DA 7800 versions of this BB that are 10 years old now and still silky smooth (although not as lightweight). By contrast, my girlfriend is on her third Trek BB90 bearing set in 4 years.