This is a restaurant review only.
The Koi restaurant is very good! Koi in Los Angeles is one of my favorite places to eat, so I was hoping for much of the same. Koi Vegas delivered, they do a good job of replicating the menu, same great taste and unique cuisine. The ambiance is also unique with Asian decor and influence.
As you would expect in Vegas, a quality experience is going to cost you...so don't be surprised! If you drink (alcohol) and eat a hearty meal (multiple menu items), you will spend $60-80/person...but you will find the experience worth it. For specific food recommendations, read my review of the Los Angeles Koi location.