Well just went through a weekend of big time cleaning and washing everything on the car. Pics to come
Spent about 10 hours total on my car, inside and out. Used Leatherique for the interior and I have to say it looks OEM to me. No shine, but it is definitely cleaner and looks closer to the way it looked when I bought the car over a year ago.
All I did was followed the directions on the Leatherique website. Put the oil on with my hands, rubbing it all over the leather. Parts that seemed a little more worn than others got a little extra treatment. I let it sit for a few hours in the sun, windows up. It was baking nice and good by the time it was done. Then I took a soft sponge with the Prestine Clean and wiped everything down nice and good. Wiped that off with a dry microfiber towel, then took a very slightly damp (with water) microfiber towel and did one last wipe down. Everything looks as good as new. It even smells new too.