Unfortunately, I will never be back - to any of them.
I have lived in Las Vegas for over 7 years now and always wanted to try it (and PF Chang's - but now there's no need) and my husband kept telling me it wasn't that great so we never went.
I should have listened. :(
We went in, service was ok - nothing stellar and nothing horrid. The food, well. That left a lot to be desired. I ordered the spicy Korean with chicken. Yeah, there is NOTHING Korean about the flavor in that meal. There is also very minimal actual flavor. The portion size is decent, but that doesn't make a difference on a meal that has little to no taste aside from spice.
I left half my meal because I couldn't fathom actually eating it again.
We went next door to order my husband something from Jimmy John's (he was smart to pass up a meal at Pei Wei). We then went home and he ate his meal while mine ran it's course. Upset stomach for 3 days, never again. Ever.