I have started using 1z Einszett products since buying the new X5. They have a combined leather cleaner/conditioner. Prior to that I had used Zymol and Lexol products. For new leather I would give the Einszett a slight edge; it seems to leave just as nice a finish on the leather as the other products and the single application step is more convenient. My wife prefers it to the Lexol on her 08 Acura MDX. We tend to keep our seats fairly clean/well maintained, so I don't know how it would fare on heavily soiled leather compared to the separate cleaner/conditioners.

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2011 xDrive 35i Sport Activity/Black Sapphire/Tobacco/Technology Pkg/Convenience Pkg/Premium Audio/Heated Rear Seats/Tint/Running Boards/Black Grill