I've been to westlake four times and have been to this place four times. Its slightly better than PF Changs, but with a slightly higher price tag.
If one wanted to build an argument that would place this place above PF Changs in quality, they would focus on the following points:
a) Sushi. And good sushi too. Not the best, but definitely better than average and not stinky.
b) Variety. Their menu is like 6 pages; no pictures.
c) Many asian restaurants serve bland food so that it will appeal to the common person whose taste buds haven't been acquainted with capcasin. For this reason, I almost always order my dishes "extra spicy". This resturant is one that respects that request. Ask for extra spicy, and they will make it extra spicy for you.