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Wasn't keen on it at all at first. But the four arm pattern with these angles makes a lot of sense, and after a while it started to make ye olde five bolt cranks look a bit silly and unoptimised to me.
This first of the four-bolt road cranks from Shimano seemed to be a definite departure from their modern tendency to make their cranks fugly as sin. Every aspect seems to have a point beyond mere styling, except for that black scoop on the arms, which is the only bit that still bugs me.
Sorry to hear about that bang to the head you had, seems to have had a lasting effect, as that just looks like the lid of a compost bin to me :)