My vinyl office chair looks worse after using this product than it did before. I specifically followed the directions, but it looked better with a tear on it than with this gunk.
I recommend looking for an alternative solution.

It works on very small repairs and doesn't blend very well. The texture really isn't that of leather. After it is repaired it cracks, creating another rip in the material.

If I could give this one half of a star I would. I gave it a full star because it traveled safely to me in the mail. You need to be a professional in the field of leather repair to make this work properly. And if you were, why would you buy this kit? Average people with something to repair should avoid this kit if they have to do the repair themselves.

hard to match color, then very hard to get it hot enough. an ok fix for a limit time but doesn't last long before the patch area begins to crumble.

It gets the patch to hot or not hot enough. I burnt my spot. It shouldn't even be offered as an option.
If you just apply the 300 degrees with an iron on the bad area only// you have good chance of success. This stuff does work.