We didn't have White Castle in West Michigan, so my dad would rave about them when we were kids, and even slip out on visits to relatives in Detroit to go gulp down a bag of sliders.
I had one once with my sister when I lived out in Chesterfield TWP, because there was one nearby. I didn't like it. My sister ate a sackfull. It's probably why she had ulceratice colitis at such a young age.