Quite so! As a beast of just such a color, I love nibs. Huge timesaver, especially when configuring custom buttons with different image and label alignments.

And what do you think of NIBs, from the perspective of each of those two hats you are wearing?

Being fairly new to this, and doing a large amount of experimenting, I enjoy being able to quickly mockup a (sort of) working prototype, without having to type too much code. During the learning process, you just want an interface, and not much else.

I guess it comes down to workflow, and that's always a personal thing.