i don't have much to add that hasn't been said before!  between two of us, we had popcorn at the O performance as our appetizer, then appetizers at FIX as our dinner.  the spicy tuna on rice cakes was fantastic, although a little annoying to serve two people five pieces.  then again, we got three burgers, so perhaps we were supposed to compromise on who got the extra burger vs th extra ahi.  we were more diplomatic and split both, but cutting a tiny sushi bite in half after drinking champagne is quite the exercise in motor skills.  i think there were an even number of mac n cheese sticks... i could've eaten a whole second order quite easily.  dipping the fries in the sauces that came with the sticks was also lovely.  yum.  plus, the two of us had plenty of food for a price reasonable enough to allow for gelato at the cafe (or crepes at jean-philippe) for dessert.