Pros: 95g per tube. Great way to knock off some serious rolling weight for your lightweight wheelset.
Cons: The presta valve can be a bit flimsy. To be fair though, I wasn't paying attention when I hooked up the pump so it's probably a user error rather than a design flaw. Just pay attention and you will be fine.
Recommendation: A GREAT light weight tube for XC riding. Not recommended for heavy riders or people those who like to do rough terrain.