I finally tried shake shack after having opportunities to try it in Texas and New York and passed them. It's not as hyped up as many of my friends tell me it is. It is a little better than In & Out (in the quality) but the price is what makes In & Out slightly better since these burgers are not cheap! But if you're comparing it to the pricey buffets and other restaurants on the strip, this is not a bad place to dine at. You're in vegas, you're on vacation - let it loose and eat fast food burgers!
Friends & I ordered the shackburger, shroom burger, fries and all shook up concrete (frozen custard blend). The fries were crisp and favored over In & Out's fries. The shroom burger was decent, not mind blowing amazingly good though. The size of these burgers are also a little small too. As for the all shook up custard blend, I wasn't a huge fan of the banana cake but loved the toffee bits.
Line may seem long but service is quite fast.