I love lexol. The conditioner does wonders on the stock leather and doesn't leave it feeling greasy. The instructions do recommend wiping down following application but even without doing so, the results are good.
The only thing to note is that their conditioner is just that, a conditioner. They recommend a thorough cleaning first, so don't expect results without cleaning the leather first.
I seem to recall an in-factory video (maybe "How it's made"?) at a high end car maker in which they applied Lexol following leather upholstery work and it certainly reaffirmed what I had already experienced.