They are a novelty. Too expensive for what you get. Fun every once in a while.
They are expensive.
There's a new trend towards gourmet food trucks. You will find them in eclectic cities. And the food is incredible. I enjoy the taco trucks here in Vegas. Awesome food. And in Hawaii the shrimp trucks are amazing.
In Russia they were the best place to get blini
I've never seen one, except on tv! Lol