Pretty expensive (it's been a while so I can't remember). The food was good bordering excellent, the service was excellent, and the view and concept is of course the best part. I would recommend going at least once for a special occasion. I think I spent around 100 for dinner and drinks for two. Worth it for a special occasion especially when factoring in the uniqueness you can't get anywhere else in the city.
It's been several years since I have been there. I remember the food being very good. For two people you're probably looking at $200-$250 I think. They have a menu online with prices on there. It's a cool view at sunset and when it's a clear dark night.
On a clear night, cool season is a better view than summer. But its great for a view of city. Its terribly expensive and poor service, but I always take my out of town guest there for an after dinner coffee so they can enjoy the unique view of the city.
Worth it just to take the elivator ride up. And the view is awsome on top as well. I usually just go for a couple drinks, im not gonna pay their prices for the food