I use these for both road and gravel tires. I was a little leery using them on road tires but they work and are for the most part unnoticeable. They are much faster than removing the tire and trying to install a tube or a boot. The only caveat is, twist the barb in, don't rock it back and forth. Rocking it is how you break it off.
I am a lifetime cyclist, racer, commuter and professional mechanic.