Very good burger....
I have eaten burgers here on three different occasions. It is convenient since I often stay at the Cosmo while in Vegas.
My first two times I was here, I was not impressed by their burgers. This 3rd time, I ordered again their Rising Sun burger (Kobe beef, teriyaki sauce, yam, spicy mayo, tempura avocado). The combination of different flavors worked really well together and this burger is definitely a hit with me. The bun, a standard burger bun, was a bit stiffer than I prefer but the overall goodness of the burger makes me overlook this minor shortcoming. I strongly recommend trying this burger.
The fries were ordinary and need salt, imo.
Holsteins offers a good range of exotic beers which I always like to taste-test when I am out. Perhaps about 15 beers on tap of non-standard-fare beers.
Get a burger here and have the Rising Sun!