I've been here twice and while I won't say it's the best Chinese place I've had, it's one of the better in Vegas. It's especially nice that it's so close to home for me.
I've had the regular jja jang myun and the seafood jja jang myun. I think I prefer the regular. The seafood one was a bit bland for me. The fried dumpling is delicious... and I also tried the garlic (?) chicken (kkanpungi) and that was also pretty good.
On this last visit their a/c was down and ... it was not pleasant considering it was over 100 degrees outside. Regardless food was still good, despite sweating and eating.
If you're into spicy food, the fire jjam bbong is pretty spicy. It's more on peppery side, but beware... I only took a sip of the soup but my friend said although good, you may pay for it the next day