Adjustable Heels? Yes or No?

I pag-ibig my stiletto, in fact, I have sacrificed a broken toe for them before. I, like may women, pag-ibig my shoes and wouldn't give them up for anything, but if I could choose to have comfort and fashion why not? So, for my business class we had to come up for an idea for a re-design of a product and see if it would be marketable. Here is my idea for a new shoe with adjustable heels. Let me know what you think (be honest you won't hurt my feelings :) )! Thanks!