It appears that any time during the first 12 months, the price is the same as day 1. Other than getting a rental during service during the first year if you purchase the premium service, there is no other benefit to getting it during the first 12 months. If you would like to finance the service plan, that may be another benefit of getting it on day 1.
I decided to hold on to my moneay and purchase online at some point prior to the 3 year warranty expiration date. Live/work close to dealer and the offer a shuttle service.