A few disclaimers before I start, I think In-N-Out is the standard which every burger should be held to and I also think Red Robin is 95% disgusting.
With that, I find Shake Shack pretty darn delicious. I think they are overpriced - but this doesn't mean I won't pay the price. They are, as the three star review on yelp is appropriately titled, "A-OK." I'll go back with groups, but if I am looking for a delicious burger lunch or dinner I'll skip this joint for a double cheeseburger at In-N-Out everyday. I only had their oatmeal pie milkshake but it too wasn't spectacular. Good - not great.
I think I am only so hard on this restaurant because everyone discusses it like the epitome of what a burger should be - um hardly. The SmokeShack burger is delicious but not worth ten dollars for a double. The cheese on their cheese fries is nacho style which is good for a few fries but ends up making you want regular fries by the end of it.
I will say this burger blows Red Robin out of the water for the same price. But at least at Red Robin you get some atmosphere and a waiter/waitress.
I'll be back, but I'm sure I won't be a regular. Meh.