You know, I really have no idea but everything else I have tried, I have disliked for one reason or another.
I used to have a 99' Expedition with tan leather interior and all I ever used was this liquid glycerine saddle soap, and that interior looked better than most cars interiors that were half the age.
According to the bottle, it claims to clean, preserve, and restore all leather articles except for suede.
I recently purchased a bottle of 4star leather conditioner because it was raved about so much, but have yet to try it. I will still use the saddle soap to clean my leather, and try this new conditioner out to see if it makes yet another improvement.
As far as reading somewhere that it isn't good, I just found an article on Autogeek that says just that. They claim that it is horrible for leather, but like I said, I used this particular version of saddle soap for four years in my Expedition and it worked great.
I'm currently using it to maintain my new 04' Expedition, my fiance's 04' Explorer, my father's 04' F150, and my mother's 04' BMW........yes, we all went car crazy last year.
