Here's my input.
I tried the complimentary leather care product from the dealer (leather dressing
98261-91V made by Pecard Chemical).
It comes in the small flat jar like shoe polish comes in. It is tan in color and I tried it on my bags and wasn't impressed at all with the product. Some work to apply and buff of and the results weren't worth the effort.
Then I found a product called Leather New.Easy to use, no buffing required and it made the bags look new again. Leaves a sheen to the leather and cleans as you use it. It's a liquid glycerin saddle soap that treats and softens the leather. I'm stuck on this product now.
I have also found that a product called "lexol" works well also.