I have never been to a Johnny Rockets so I have nothing to compare it to.
I thought the place was very cute, fast paced, busy. We were seated right away but shortly after, we noticed a wait at the door. It was a very busy time though.
Food was decent. Kind a pricey but typical for this type of place. We didn't get a chance to have a famous shake but I hope to go back and try one out. Next time I'm in Glendale....
ONLY THING that sucked is the restroom is a 1-potter, each. Line around the corner for the use of both rooms and the ladies room was out of soap & paper towels. Employees were coming in and out of the kitchen and I felt we were in the way standing there.