Does its job!  This is an oil based spray so you have to spray it on and rub it in.  I prefer to spray on a rag first, and then rub the rag on shoes/boots.  This helped renew the color of my rust colored boots.  I didn't realize how light they'd gotten until I sprayed them and now the original deep color fo these boots is back!  Be forewarned that these will darken the color of leathers but I didn't find that to be a bad thing at all.  The color this spray provides is very rich and full.  Doesn't affect the color of my black boots.