I'm pretty sure the leather seats still get vinyl on the sides, and that strip between driver and passenger. I'm positive I read it on their site too.
I've got a used gunfighter and lady, black leather, and the drivers seat is looking pretty worn. It seems to be showing the pattern of glue underneath too, kind of like raised areas.
I'm going to need at least that section recovered sooner than later. I have no knowlege of what kind of care, or lack of care it got before I had it.
I basically bought the seat for the passenger backrest, which works fine. When I have a passenger I put it on, and don't worry so much about dumping anyone.