KooKoo chicken has definitely improved the last time I visited (which was about 3 years back of so) around their opening time. It used to be really oily chicken and you could taste the grease but they've definitely worked on the quality and I love it!
As one of the few places offering Taiwanese food, the KooKoo bites are really good! Kinda like popcorn chicken (or is it?) it's very delicious and not too heavy if you are not feeling devouring an entire deep fried steak. The prices have gone up over the years so it's not a place to grab food to eat from on a constant basis.
Overall would return for sure for another experience!