You have to try their Kimchi Bibimbap. It's really freaking tasty. If you're looking for a decent Korean restaurant uptown that isn't down by Yonge and Finch, Ga Bin is it. There is so much variety to choose from and their unlimited side dishes are tough to beat (their crispy potatoes are THE best). The only thing I wish they would introduce into their menu is kimbap, Korean sushi. That really is the only thing they are missing. But everything I've had from their menu has not disappointed. You can't go wrong with their bibimbap, and they are pretty good about accommodating vegans.
One thing that might throw some people off is the poor ventilation. The place is quite small, so air circulation isn't great. They have table bbq, which often gets quite smokey, so shy away from wearing thick knits that'll absorb the smells for an eternity.