We have them...used them as a justification to get a new vehicle

as if we could resist getting the Hummer! Hope we never need them, but handy if needed. For some reason, they are about the least expensive add-on.
It was difficult finding an H3 with the combination of Base, Sun-roof and side air-bags without XM radio in Southern California. We didn't consider Yellow until we found one at our local dealer and then I realized that this one had our name on it, and now love the color.
We don't play "Where's Waldo" in the parking lots any more as I can usually spot "Poppy" when I step out of the store.
Best regards, Happy Jack