Came here for the first time back in March, and I tried the Cupcake ATM and thought it was the coolest thing ever. The price was a bit steep, $4.25 for a cupcake which wasn't that big to begin with, but the overall experience that first time was good.
My second visit was about a week ago with my boyfriend, we came in around noon and it was packed! The service was very very slow, for a line that long, they needed more employees to step it up and take customer's orders because a few people had left because of the long wait. The one who took my order (red velvet ice cream and a peanut butter pretzel chip cookie) was the same one preparing the food, which I thought was very inefficient. Prices were a bit steep as well for a scoop of ice cream and a cookie ($8 total for everything) but hey, it's the Strip so prices were expected to be as they were.
This place is great if you're craving something sweet and just want to experience the Cupcake ATM, but other than the Cupcake ATM, this place isn't all that special.