Ah, the quip puzzle. A great quote puzzle must be 1.) funny / whimsical and 2.) grammatically untortured. The first criteria is so subjective, but the second is much less so.
Especially when making up your own quip, it's too easy to add an extra "the" or pluralize a word to make the crossword symmetry work. I appreciate how nicely this quote flows. It also breaks up pretty nicely, skipping to the next line when a semi-natural break occurs. That's tough to do and still adhere to regular crossword symmetry.
I found the solve tougher than a usual Thursday, since 1.) you have to solve a quip puzzle with only the downs at first and 2.) the downs were full of esoteric names. I was super thankful of my pharma background, as I entered ZYRTEC just off the T. Then I was super grumpy when I realized ZYRTEC is an allergy medicine. D'oh! Toward the end, CIMINO obscured the starts of parts 3 and 4 of the quip, making the puzzle very difficult for me. I am glad to learn more about a film director I really should have known anyway.
Some really nice clues: