The chances of this item failing is very rare. Due to its size and low cost, it is something that can easily be carried in saddle bag. In case of valve core failure, this is super easy to replace. Works PERFECT and SUPER EASY to INSTALL!
I recommend having the extra Tufo Presta Valve Core in saddle ready to install with teflon tape already wrapped around bottom thread.
I do a lot of cross racing and end up using a lot of sealant for flat tires. It eventually clogs the valve cores and I end up swapping out for new ones.
