Sorry, haven't really followed up on this.
Not sure I love the B7 bar, the things on the front are strange. It is light, for sure, confirmed ~140g just like it says on the site.
One thing - the angle isn't nearly as much as the bars that came on my Epic... lining up the clamp area, you can see how much of a difference this is at the end of the bars:
That's a pretty big difference, you'd need a significantly different stem length to account for it. (yes, the photo isn't lined up perfectly)
Nothing wrong with the bars, but I much prefer the more understated look of the B4 bar, which was $5 less.