I agree on several points. Yes the inside is where the driver spends the majority of his/her time with their vehicle. Is it the female customer that appreciates this aspect of a detail the most?
What about the rest of the interior? Console, dash etc. Were the carpets shampoo'ed or just vacuumed? What about the seats (my monitor displays them as though they were fabric???) What were your products and processes?
I've never spent the extra time putting in the "designer" vac lines, but they definitely have their following.