I just had my third flat tire experience with a Tesla. First flat tire was three years ago in my S model, the next two where with my X model. In all three cases the tire repair kit did not stop the small nail puncture from leaking. In my first experience with my model S it was three hours before the Tesla road service could come with a spare tire. He had to go to another location to get the spare and then got caught in rush hour traffic. I was only 18 miles from the Tesla Service center. Three hours on the side of a busy highway was no fun. Tire two was on my new Model X two years ago that went flat overnight in my garage. So I removed the tire and tried to get it fixed locally. Went to a number of nationally know tire dealers, some handled the same brand. Not one would repair the tire. So I had to drive 50 miles to the service center to have it repaired and balanced. Tire 3 on my X started to lose air pressure about 5 miles from my home. Again I tried the tire repair goop and managed to get the pressure on my tire back up to 35 pounds before the small airpump had to rest. Went several miles and stopped to pump the tire up again. This time I had a mile to go and got the car into the garage with 17 pounds left in the tire. Called Tesla Service center to see if they could recommend a tire repair facility in the area. The told me to try a Firestone dealer or another national tire chain. Fiquered it was two years since last go around and by now with more Teslas on the road I should be able to get it fixed locally. Again no luck, so I had to put the tire in my second car and drive the 50 miles to the Tesla Service center to get it repaired. Only problem was the nail puncture was about 2 and half inches from the edge of the tire and they said it couldn't be repaired, therefore $400 plus for a new tire. Also, Tesla does not offer any road hazzard insurance for their tires as opposed to Costco where I get all the tires for my second car. So you ask why would I now want to keep a spare mounted tire in my garage? I love the car but I hate the issues I have had with flat tires. I am planning on taking a trip around the US next summer and I definately will bring a spare along.
PS. The green goop did not mess up my tire sencing gage. Could be that I keep putting air in several more time after I put the goop in.