I've had the Tesla kit in my Model S since 2014. It's fine, but nothing special. In fact, the hose on the sealant disintegrated and I had to replace it. Fortunately Tesla warrantied it. For the Model 3 I picked up a Slime kit similar to the one you linked, but at the local auto parts store. I also carry a plug kit so that the sealant is a last resort.