I can not understand the positive review. Even after half a year an unpleasant odor note remains in the leather. The original leather smell is gone. I find that very annoying as I have so nevertheless rubbed some of my custom made for my couch. Unfortunately, I noticed that in the preliminary test on a small piece of leather is not on.
My personal test results on leather natural untreated + Impregnation + Optical OK
- Stubborn remaining unpleasant odor even after several months - Not a complete list of ingredients - Not 100% renewable raw materials (petroleum jelly, ie crude oil derivative, is included)