I keep this in the frunk at all times:
I've used it for simple tire inflation, and it works great, but I've never needed to use the fix-a-flat functionality. The first review on Amazon states that:
1 - it does NOT ruin the tire. you can wash it out, plug, & re-use. others render the tire unuseable after they harden it, no matter how small the hole was
2 - This does NOT ruin your TPM sensor (tire pressure monitoring sensor). Others destroy your sensors & they need to be replaced. You can simply remove, clean, & reuse the sensor with this kit.
Hope that's helpful.