Excellent if you plan on bike commuting. Holds the bag in place nicely when pedaling hard!
This is a nice feature to add to a bag. I'm pretty small (5'2"), and even if I'm in great shape, it's hard to bear all weight of a heavy bag on one shoulder. The cross strap helps me distribute some of the weight to my back and hips. I do worry about the d-ring attaching points; they are plastic, and though they seem sturdy enough, I can't help by wonder when they're going to snap. But so far, so good.