There is a lot of hype around Holsteins and while I enjoy burgers, I usually go for turkey, chicken or vegetarian (this menu has all three).
I ended up ordering one of their Crazy Bird chicken burgers, which was good but not exactly unforgettable. We tried their sweet potato fries and onion rings which were decent but again, not wowing. The price of the burgers is quite a bit more than you will pay at say Smasburger, without any extra wow factor.
I don't see myself returning with so many other food options in Las Vegas.