This place is absolutely a gem. Easily the best dining out experience in Vegas- and yes, I've eaten at every one of the big hotels/celeb chef joints. It is nestled away in Summerlin and you'd never guess its there, hidden in the business park. Ambience is wonderful. The service is outstanding. But the food, my god the food. If you're in town visiting it is a drive- nowhere near the strip. But if you live in Vegas, head west. It's worth it. Oh and make sure you get Otash as your server. He is outstanding.
PS: best tiramisu in the world. And I've been to Italy.