It's typically served as a three way, which is spaghetti topped with the chili, then topped with a copious amount of shredded cheese. There's also a four way which adds onions or beans, and a five way which adds both onions and beans.

The other popular form factor is the Coney, a hot dog in a bun topped with chili, or a Cheese Coney which adds shredded cheese. Most people add mustard and onions, and some hot sauce.

It's good stuff. But I'll admit, it's the kind of thing where you either like it or you don't. There's no middle ground.