Adjustable Heels? Yes 或者 No?

I 爱情 my stiletto, in fact, I have sacrificed a broken toe for them before. I, like may women, 爱情 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 你 think (be honest 你 won't hurt my feelings :) )! Thanks!