I visited Shake Shack with my boyfriend on a recent trip to Vegas. Overall I was pleased; the wait time was not long and the burgers tasted fresh. I had the vegetarian burger, which was really good, and we shared fries. We were surprised that the burgers were smaller than expected. They definitely have a lot of variety on the menu, and the custard style ice cream (which I sampled) that is also used in the shakes was thick.
For the two of us, both with one beer each, the total came to about $35. It was reasonably priced as far as Vegas is concerned, however it left us a little lacking and there wasn't much "wow" factor for somewhere that has been talked up so much in the past. (Perhaps it's the novelty of having a Shake Shack out West that gets most people.) However, the wait staff was very friendly and helpful and we had a pleasant experience.