I'd never heard of it and yes, I bought one so we could try it.
It was various colors and felt like the skin was loose, like those easy to peel *Little Cuties.*
They smell like faintly like a tangerine when you are peeling them.
They are supposed to be a (multi) cross between a tangerine, orange and grapefruit. The sign said they taste sweet like an orange but are bigger, obviously.
We did not find it to be that sweet. It was certainly edible, but you could taste the grapefruit in it, for sure. Since I'm not a big grapefruit fan, well, I won't be buying another one of these.