Bought a soul red / white nappa premium plus today. Cleared all my questions with finance before signing and they were perfectly clear. The lease is structured using simple interest, pay off the non-amortized amount and there is no interest. As with typical loans, interest is front loaded in your payment so if your goal is to avoid interest, pay off quickly.
This has been quite the journey to purchase - three dealers, three offers, three months, hours reading and researching, and lost sleep. In the end, I drove away with a huge smile and am ecstatic to see this car in the driveway.