Here is a close up of my wife's gs350 f sport seats
(untreated) shot with an iphone with flash- you can see the leather is
starting to tear by the seams, nevermind the number of cracks:
This is a picture of my 30,000 mile m3 driver side bolster
(treated) with an iphone and flash:
Here's her passenger side bolster
(untreated) to compare how similar her nappa leather texture is to our m3 and what it looked like with less wear:
This is her mileage which is less than mine: