I went there with a co-worker for lunch for our first visit at Yum Yum BBQ. They haven't done much advertising. The only reason we knew of its existence was from a previous visit to another restaurant at the mall. I have been craving Korean BBQ chicken and immediately thought of coming to this place. I ordered a 2-piece Chicken Meal which includes small fries and a can of soft drink. The portion was food and was the perfect size lunch meal for me. I had the shallot chicken and they were yummy. Something to be aware of is that there is still mildly spicy taste, which I think is in the batter... so it doesn't really matter which flavour (Yum Yum, Shallot, Spicy, Regular Fried) you order, it will be at least slightly spicy... something to be aware of if you have young kids.
The service received by the waitress was great. The interior of restaurant is well thought out and decorated nicely. I will be back but next time I will order just the fried chicken without the fries so I can eat an extra piece of chicken!