There are a number of locations but the one I go to the most is the one on bloor. I also go to the Dundas/Spadina location. The Bloor location is a bit more efficient, but I've had good service at both. Ka Chi is my latest obsession so I can't recommend it enough! :)
How do I love Ka Chi? Let me count the ways!
1. Service is consistently good
2. Their rice cakes. I get the rice and fish cakes with bul go - gi (beef) in a sweet sauce often, and I could probably eat this every day.
3. Cheap, cheap, cheap! $8 entrees - hot pot bimbimbap, stews.
4. Vegetarian options for my vegeratian friends!
5. Easily accessible location - easy to meet up with your friend!
6. Patio in the summer :)