I always eat at Archi's whenever I'm in LV! Their Pad Thai is the standard to which I measure all other restaurants' Pad Thai - within the U.S. - and it is so delicious! They have a few locations now since I first discovered them roughly 10 years ago and their S. Rainbow location is their "fancier" one. I would recommend this restaurant to everyone and I can't wait to back for another dose of their Pad Thai dish. Also, their Tom Yum soup is one of the best I've had so far.