Excellent. I bought it to darken - "restore" nubuck leather, and it not only does the job, but also maintains the original color and allows for the creation of a patina, depending on the application method and layers.

Its price is a bit "steep" compared to how much one would buy similar products abroad, but we are used to that, aren't we?

It makes old inflexible leather good as new! Only downside would be that you have to leave it for over 12 hours to treat the leather.

I bought it for a pair (black) leather boots. I have used it twice so far. The leather has noticeably softened gradually, from the first application within 1-2 days. The waterproofing it achieves is very good and rainwater just rolls off. The quantity (100ml) will last me for a very long time.

It is good to have the boots warm before applying (you can leave them in the sun or slightly warm them up by blowing hot air with a hairdryer inside for 1-2 minutes) to make the oil absorb more easily. For application, a classic (soft) shoe brush is sufficient (I have one made of natural horsehair). For better results, after application, wait a little while for it to absorb and then polish with a soft cloth to remove any excess oil.

It was purchased to be applied on a leather bicycle saddle in order to soften it. It worked fine, as long as the temperature is right (it requires relatively warm weather to absorb it or the duty of the sun). It was not used on shoes, so I cannot provide information about that. I did not notice any discoloration on the leather.