Yeah, Storyboards are still in their awkward phase. That's totally fair. And I don't yet trust them for running view navigation.
But you know what they're awesome for? Static table views.
If you want to build a grouped table view as login view, settings panel or the like, Storyboards are perfect.
I'm also a big fan of Storyboards for prototyping. You can get to a pretty good fidelity demo of your app's information architecture, and often you can re-use what you built when it's time to code the app for real.
(Though I often cut the Storyboard content out and paste it into a nib.)