I've been to the Braddah's Island Style near UNLV, and I much prefer the one at Centennial. The restaurant is similar to Chipotle restaurants: you tell the food handler what you'd like in your burrito and they make it for you. It's a very casual place and not busy at all.
I got the Kalua Pig burrito with seaweed rice, pinto beans, lettuce, and cheese. The burrito was well made and the pork was very juicy and flavorful. If you're watching your salt intake, you might want to go easy on the pork because it's deeply marinated. The Braddah's at UNLV was way saltier though, so eating at the Centennial Braddah's was refreshingly good.
The restaurant is Hawaiian themed and has a relaxed atmosphere. The restaurant was clean and well-lit. There's not wait staff so you have to get water yourself, but that's what I expected from a casual restaurant.
If you're deciding on a quick bite to eat for lunch, don't hesitate to stop by Braddah's. I only had 30 minute for lunch and was able to order and finish my meal within that time (including the roundtrip to work).