I am carrying this with my road tubeless set-up. Still waiting for a chance to use it.
My friend has used it to fix a hole about 4 mm that wouldn't seal in his Mavic road tire . He is still running the tire tubeless with several 100 more miles on it after the puncture .
Very light and useful item.
Lightweight, small, and easy to carry. Have used a couple of times now repairs are quick and effective. Can't ask for more in that regard. The kit and replacement plugs are not cheap. But, because tubeless tires usually do not have as many issues as regular clinchers, the cost vs convenience and effectiveness might be worth it in the long haul.