This is the best Thai food that I've had in...well... maybe ever. I haven't been to Thailand yet though (01/10!) Easily the best in Vegas. MAAAAAYbe Krung Thai is close. That's it. Great authentic N.Thailand dishes will knock your socks off. While waiting in the lobby you'll see the wall of reviews, many saying it is the best Thai in the US. I haven't ate at every thai place in the US so I can't co-sign that, but its fn good.
CLIFFNOTES: WOW. Authentic yummy thai food. Good location off the strip. Long ass wait so make a reservation. And yes it is THAT good. Trust me.