These work great!
I am so happy to have found this product as I was spending a lot of time cleaning the inside of my shoes, hoping to eliminate or prevent the inevitable odor that occurs.  Or I would just throw shoes away because I couldn't get anywhere myself.  These slip right into any pair of shoes and the sticky backing helps keep it in place.  And they do a GREAT job with eliminating odor and absorbing sweat.  I am quite impressed!  You do need to replace them after their lifecycle ends, or the smell just starts up again.  But while they are in there, they do the trick!  I also find that I use them mostly with my heels and flats, as opposed to sandals and boots.  But I don't have as many issues with odor accumulating in my sandals and boots, so it has not been an issue for me.  I even use them in open toe shoes as they just look like the inside sole of the shoe (but nicer actually, since they are clean and neat!).  I love them and highly recommend them!
Rating: 5 stars