I ate at smash burger for the first time recently. Thought I would try it because everyone raves about it. I learned very quickly into my first bite that their "secret special sauce" has mustard in it... I had mustard so much it almost made me throw up. But after solving my problem and ordering a new burger it was AMAZING. I got the sin city burger which was AMAZING with the fried egg and onion strings. If it wasn't so unhealthy I would eat there more often