I can transfer my data using adb to the desktop, and the rest is backed up to the cloud, so I'm not too worried about that. Rather than a crack, it's more of the entire front shattering. The touch screen is pretty much unresponsive, unusable.
Yeah, I've heard of the much improved battery life, which is one of the reasons I'm considering the trade.
Hopefully it'll be more durable than the Nexus 4, which was noted to be remarkably fragile even for a smartphone.