useful untill you need to get a new set of tires or flat tire

Basically you got to be very careful when you change a new set of tires (for new car you have to get a new set after 30-40K miles). You need to pre-warn the tire dealer not to damage the sensor behind the valve!!! or you have to pay $300 for a new sensor and reprograming it at Toyota dealer.

If you have a flat tire or got a nail in the car and you lost too much air, then you are unlucky, it is not covered by the warranty. I listed the option you have in this case.