On Saphir Renovateur, I would like to say I use it because it has good coverage and sinks in gradually allowing for even treatment... but that's not really it. I like it because it smells like turpentine instead of the petroleum distillate similar products have. The shoes also don't smell bad after. It's a little thing, but I have unused containers of other products because of smell. (Reminds me... I should try to give some of that away.)