Stopped at Jjanga Friday for a work lunch with a group of coworkers... there were 9 of us in total. The restaurant is really cute - very trendy, several hibachi tables (but hibachi is only available for dinner), overall really nice looking. The hibachi area is separated from the regular tables by a divider thing. Overall, it's really nice.
For both lunch and dinner, they offer an all you can eat option for $20 for lunch or $25 for dinner. That's pretty cool! Only one person in our group ordered the AYCE option. I got a lunch special bento box and some tuna sushi. Everyone's sushi came out pretty quickly, but anything from the kitchen took AGES. Even to the point of someone who ordered 2 appetizers... their appetizers were the last things that came out. Last. At the end of the meal. My bento box came out a good 30-40 minutes after my sushi. One person never got their order of gyoza that they had ordered as part of their lunch sushi roll combo.
Aside from the slow service, they were just very nonchalant about our group. Waters with no refills. Parts of orders ignored. One person's appetizer was dry (the Dynamite, which is supposed to be creamy).
Overall, I'm just no impressed at all. The subpar service was not worth their automatic 20% gratuity added to groups. But I guess when you have a guaranteed gratuity, you don't care how awful the service is...