Live nearby and been wanting to come try it out since it opened. I gotta say, it was surprisingly authentic and tasty to boot. Tried the mayo pork don and the chicken karage udon. Both were satisfyingly tasty. Got takoyakis on the side and that was also yummy. The mango yogurt drink was refreshing but not bland. The matcha green milk tea (hot) tasted of real green tea and not overly sweet that you'd find at all the bbtea shops within 10kms. Everything was great. If I had to complain, I'd say the pricing and serving sizes are a little on the extreme for the mall but take the shop, plop it in j-town without changing a thing and most wouldn't bat an eye at the pricing and serving sizes.
I *will* go back if that's worth anything.