So today I picked up my shoes and the lady there tried to sell me these heel protector things. They are like these rubber clear things that I guess protect the heel? I bought them because I want to wear my heels around the house to wear them in so they aren't extremely uncomfortable the day of. Anyone used these before? Do they work well? Are they worth the $10 bucks or should I return them? Do you guys usually have problems with the heel getting messed up?