It's been a year and I have to tell you... the interior is EASY to keep clean. Right now it looks like the day it rolled out of the showroom. All I had to do was grab some Mcguires leather cleaner and conditioner and clean things up. I've done it once in the past year (a couple of months ago) and it's good to go. It didn't need it before then.
If you're thinking about getting a light interior like this, don't let the cleaning issue scare you unless you think spending an hour or two each year is too much.