I've been there many times either on the patio or inside. If you have a chance, make sure you spend time on the patio on a nice warm day with some beer and Korean fried chicken.
The patio is at the back away from the busy Yonge street traffic so it's enjoyable compared to other patios nearby. Alternatively, the inside of the restaurant needs a major reno and should get rid of the booths to make room for more tables and a spacious experience.
As for the food, they have a wide variety of flavors for their fried chicken. You can order plain, spicy or with soy sauce. On Monday or Tuesday, they offer half price wings specials. On regular nights, take advantage of their chicken and beer combos for those who enjoy a drink or two.
No need for reservations but definitely get there early on a nice day if you plan to enjoy their patio of paradise.