I was in Miami Beach for a day and stopped in with my 8-yr old daughter on a Wed night and was lucky enough to get a table without a reservation. The restaurant got busier as the night went on, though.
The atmosphere is great - casual, but a little bit upscale (i.e. no tie required, but wear a decent pair of shoes) - and the food was fantastic. The service was outstanding. The cost was a little more than what I'm used to in the Midwest, but the rent on Miami Beach is also a little more than it is in Dairyland USA, and the bill was certainly reasonable. Overall, the meal was worth every penny, especially considering how good the service was. I'll be making a return visit here the next time I'm in Miami.
And one more note on the service: I left a bag of my daughter's belongings behind at the restaurant but we didn't realize it was missing until we were all the way on the other side of the state at Sanibel Island. I contacted the restaurant and the owner ended up mailing the package to my home, at his cost. It got there before we did. The good service goes all the way to the top! How can you not love that?