Rotier's has one of the best burgers in town, but don't expect much on the service front. When you walk in you'll wonder if you're supposed to seat yourself or if they'll seat you.
Wait around looking dumb enough for a few seconds and they'll eventually come and seat you. The salads aren't exactly what I would call fresh, so don't expect much there, they specialize more in anything that's grilled or fried.
All that being said when it comes to the burger, the fries and everything else that's no good for you but tastes so good, well Rotier's will make all of that for you as good as anyone else.
Slightly pricey for what you get, but since they are about two blocks from Vanderbilt I don't blame them, gotta take the rich kids for everything you can ;)