Complete waste of money and time. And I had a myVegas comp too! We upgraded one of the comps to a fur coat and a hat + a drink for an additional $35, wow what a waste of money! The bar is -5 Celsius, not -5 Fahrenheit, so it's really not that cold at all. (23 degrees Fahrenheit) It's the size of somebody's king size bed room with an island size bar with limited liquor choices. The only fun part is that your drink is served in a glass made of ice that you can chew on while you drink your overly sweet drink. We stayed for about 10 minutes. Not because it was cold, but because we were ridiculously bored.
Bottom line: Waste of time. Waste of money. Gimmicky. Save your money (or myVegas loyalty) for something more exciting.