Yep, that's the stuff but mine is an aerosol. And I sprayed it on my Maria Terraine which is light colored. Now don't fret because AT FIRST it makes it look alittle wet (as it should). It will NOT stay that color. After an hour or so it is back to normal, but now with a thin layer of protectant.
And spray it outside or in the garage as it is abit smelly.
There is also a good protectant made by AppleGuard. There are threads here about that product and I have some of it too, just haven't needed it. I am about to the end of my can of Wilson and will try the Apple then.
Here is the link for AppleGuard:
http://leatherstuff.com/shop/index.php?id=290
I also own the Apple leather care kit which includes the cleaner (for really dirty bags) and the conditioner, but have not used any of it yet.
I would say a can of Wilson might spray 6 bags. Note though that I double spray the handles and bottoms of the bags.
I was caught out in a thunderstorm with my Maria, the back side of her was soaked. When I got inside I just wiped it off and after a few minutes of drying, she was good as new, not a spot.
I do wonder though about other types of leather and if they are so forgiving, such as the Bonnie.