I believe most of the high ratings on this place are due to folks having fond memories of this place from their childhood in the midwest. It's really not that good. But it is pretty affordable (double cheeseburger and fries for $3.99; Shakes for $2.99-$3.49).
It's been open for about 3 months in Vegas - and the line is still 2 hours long on a Friday night? Really?!? It's not worth that, we grabbed take out and it took ~15 minutes.
The shakes were especially disappointing - the Shake costs just almost as much as the burger and fries, and they put Shake in the name of the establishment. So, it should be a higher quality and more tasty shake IMHO...