I got it from Discount tires on mine. HAve not had to use it on these tires yet though.
In the past I had it on some other tires and used it a few times. I never had an issue. They really have a no questions asked policy there. ONLY thing they look for is to see if it was intentional. If you have a screwdrive hole poked in the sidewall I heard they will not do it. however, you can drive in with a stick sticking out the sidewall and they will do it no problem. (don't ask me how I know that, lol). I have never been questioned myself when using it.
In the past I had it on some other tires and used it a few times. I never had an issue. They really have a no questions asked policy there. ONLY thing they look for is to see if it was intentional. If you have a screwdrive hole poked in the sidewall I heard they will not do it. however, you can drive in with a stick sticking out the sidewall and they will do it no problem. (don't ask me how I know that, lol). I have never been questioned myself when using it.