It's real Napa leather and not coated leather. It's very smooth, very tight and very soft. The appearance is so pure and natural thus why I stress this product has no fake oily or shiny appearance characteristics that would IMO ruin the quality of what I paid for in the car.
More than you asked but also very cool and interesting.
https://www.audiusa.com/technology/design/interior-design.html
The scent is very slight and neutral. It fades and does not linger. I apply it with a folded section of microfiber cloth and after I'm done with one full seat and it's nearly fully soaked in, I will begin to just wipe any remaining product dry and help insure it blends without leaving any noticeably applications marks. Rare but if you heavily soak or spray it directly on the seats you will just need to wipe that area dry.
I hope this helps.
In terms of scent, the VERY best I've ever had is Griot's Garage Leather Care Spray. Bummer is I can't seem to find it online any more. However, I'm off to a local place that I know sells it. It's 100% New Car Leather scented. I loved using it in between using the Optimum product. I'll post back if I find it.