It is the BEST Chinese restaurant within a 200-mile radius. I can't think of a good Chinese restaurant in L.A that's equivalent to both the food and decor there beside Duck House in Monterey Park.
Their food is so tasty and is creative too. Try the pork slices hang on a wooden lift. I had to ask them where they got the wood thing as I had never seen one like that before in America. The answer was - they got it in China. That tells how authentic they are. Speaking of that, don't expect it to be a regular Chinese restaurant you would find that has poor service, disgusting hygiene and out-of-touch decoration. It is in fact a more upscale one, nothing like those in Chinatown. But that doesn't stop them from offering some good lunch special deals.
My genuine recommendation: if you're in Vegas and craving some Chinese food, go to J&J. It's not on the strip but you'll be amazed.