Always come here without a fail when I come to Vegas. The curry ordering concept is pretty simple - you pick your curry base, rice, toppings, and spiciness level. There are other options on the menu - of which I've only tried the katsudon (pretty good).
It gets pretty busy around lunch time so it's best to come earlier if you're in a rush and/or want to find a good parking spot. The complex it's in is not exactly the best, but the food here makes it worth while.