I've only been once (in Beantown, on the waterfront), after hearing about it for years.

One word: MEH.

I think we dropped a bill for lunch (wine and cocktails of course), and came away disappointed with the food. But the service was good (sat at the bar), and the atmosphere was not terrible, considering the touristy location.

I'd go back, but then again, I'd go back to McDonald's too.