I don't have experience with the Tesla branded kit, but personally for the money I would rather get a scissor jack rated for the car (you may be able to repurpose one from a previous car, may also need a lug wrench), jack adapters (which you may need anyways as some tire shops don't have them), a 12V air compressor, and a tire plug kit. Some have suggested to also carry a block of wood (or those plastic camper levelers) to drive over and raise the car for better clearance (as not all jacks will otherwise fit).
That seems like it'll handle more situations and wouldn't make a mess inside the tires (which whoever is repairing the tire would have to clean up).
This is what I do... no complaints.
The problem with goo type sealants is that our cars come with a sound deadening foam liner on the backside of the tread. More often than not, goo type sealants won't make it to where the puncture is, but will rather pool in one area of the foam. This leaves you with not just a flat tire, but a flat out-of-balance tire.
The advantage to a plug kit is that they are dead simple to use, and a plug is considered a permanent repair.
Living out here in the desert comes with a lot of good things, but one bad thing is the number of flat tires. We average three flats per year here. I've been using plug kits for nearly 35 years now, and never had a problem.
Just watch a couple of YouTube videos on how to use a plug kit. And one more tip: carry some rubber cement in your tire plug kit. Use it to lubricate the plug for easier insertion and easier plug tool removal. Using rubber cement
drastically reduces the amount of force needed to properly place a plug and remove the tool. It makes it so easy that my wife actually did the last tire plug on her Sequoia by herself.
In addition to the stuff in the quoted post above, I also carry side cutters, standard pliers, a needle nose pliers, and a couple of pairs of rubber/vinyl gloves.
Make sure you test your 12v air compressor before tossing it in the car and forgetting about it.