My wife and I stayed at the Mirage, so this place was super convenient. They do have many different burger options, but I was not that big of a fan of the burgers (only tried the beef burgers). The burgers were definitely big, but a little messy and not really warm/hot. The french fries and fried pickles were pretty good. If we come back, then we may pay the extra few bucks and get the duck burger (those did look really good).
The milkshakes on the other hand were amazing!!! You cannot go wrong with the nutella flavored milkshake. You can also get your drink spiked! They also have decent combos you can get with your burger (like a milkshake), so I definitely recommend going that route.
The whole Las Vegas area can get pretty pricey, so you are getting a good deal relatively speaking.