My Tesla model S have 49,600 miles, so after asking some questions to X-Care guys and to chat with Tesla about their ESA, I just purchased this extended warranty from x-care for 6 years!, yes, more than the normal 4 years that Tesla offer. X-care offered me better options and at a better price, I really think that is a plus because it is prorated, meaning that if I don't have any issue, I can cancel after some months or years and I will be paying back. The price came to less than $75/month for my situation, so I think that it is worthy, because I am hopping that my car will be part of the Tesla robo-taxis network. By the way, for only $350 extra I can convert my policy to commercial.