Earnings after treatment of a car-leather set (black) is very useful is visually. The leather feels fresh and supple and you also will not slip, as it can sometimes be the case. Have successfully treated also lots leatherette. A crunch of leather I have not noticed. From promised leather smell one must however not promise too much. Directly from the container smells the means first of all rather than for flowers fertilizer to leather. That is better, but leather still smells different.