Was here last week for a work event, we booked the private room which was AMAZING!!!! It had the perfect view of the Bellagio water show, random girls in their underwear walking around with their Paris Eiffel Tower shaped drinks, the Urban Outfitters next door in the Miracle Mile shops... quite simply, a GREAT VIEW!
This is where all the gratuitous words end.... the rest of the Koi experienced sucked! The food was horrible, the set menu was served family style, the waiters were slow and unattentive, overall - food just not very good for the price you pay.
We had:
Miso Soup
Edamame
Tuna on Wontons
Chicken in Miso Broth
Large Giant Prawns
Shitake Mushrooms
Eggplants
All items were below average, and you're simply paying for the sexiness of the place. I suggest you take your money elsewhere, and try another Japanese joint in Vegas.