Archi's is the brick house of Thai food in Vegas. Always consistent. Always good. It offers a consistently solid Thai dinner.
They do a great job with the curry and I've tested their red, green, and massaman options. Flavorful and they offer the level of spice you want (warning: 6 out of 10 on the heat scale lit up your mouth and I'm someone that always eats the jalapenos when I order Mexican). The pad thai didn't blow me away, but it was solid and delicious. I've had numerous dishes with chicken, steak and tofu and overall they do a good job.
Bottom line: you will not be disappointed eating at Archi's. It's not the greatest thai I've ever had, but it's a solid choice and good for the price.