Decent if you ALWAYS use them
I tried these for two things:  shoes I'd never worn and shoes I had worn and had gotten a little smelly.  I don't wear socks with my flats or heels at work.  I usually have to replace my flats when they start to smell (about a year) so I figured this would be a great solution to making them last longer.<br /><br />I did not notice any difference whatsoever in using them in shoes that already smelled a little but in the new shoes, it did seem to make it last longer without getting smelly.  They're far too expensive for that though...at this rate, it's cheaper for me to buy new flats when they start to smell than to preserve them with these at $3+ a pair.  If you use them everyday or even Monday-Friday, odds are they will not last the stated life of a month.
Rating: 2 stars