I honestly don't really know what the hype is about. There are only a small number of items on their menu that is good but overall can't say it's worth the wait. They don't take reservations so you should expect to wait an hour for seats on a weekend.
Usually, at Korean Chicken joints, I judge it on the original chicken and spicy chicken as those are the staples. However, I wasn't too fond of their seasoned spicy chicken. It's not the traditional Korean spicy chicken (yang nyeom chicken) that I'm used to. There's a hint of cinnamon in it that doesn't really work for me. The cheese chicken is meh. It was barely touched at our table.
Despite the long wait and the interesting spicy chicken, the green onion chicken and steamed eggs is delicious! The green onion chicken has a nice kick of wasabi in the sauce that makes it better than other Korean chicken places I've tried.
Overall, Mymy Chicken has great ambience, decent food (depends what you order) but it probably wouldn't be my first choice.