Congratulations on your soon to be new-to-you MS! I suggest you ask your Delivery Specialist your questions about service, and do that via email if you can. It would seem to me some of the answers or decisions you come to, may depend upon what service has already been done on your MS, and frankly how Tesla interprets their own terms when it comes to miles/time and prepaid service -- or even if prepaid service is available on an inventory vehicle, I'm not sure. In terms of skipping a service -- some do, some don't. It's a lot of reading, but many owner's POV is expressed upthread. Personally, I pretty much follow the mfgr recommendation on time or miles. When I've paid cash for service in the past, with my relatively low mileage, I've been known to push service out for a few months on my former ICE. I'd probably do the same with my Tesla, but with my prepaid MS service, I will always following the rules and have service done based on miles or within 30 days of my anniversary date. Service terms are clear the work needs to be done within 30 days of the anniversary date. (I took delivery of my MS 10/5/2015, and it is presently in for it's first annual service. ) Good luck and enjoy that MS!