[purans]

I generally use storyboard for few initial view controllers. After that, I either use separate nibs or code it. Storyboard can become messy and hard to navigate around if you put lot of views in it. Even though, you can zoom in and out, still it's messy. Also, it really depends on what you are trying to do. There will be scenarios where using nib or storyboard won't just cut it.