I absolutely hate standing in line for anything, but I waited for Sushi Dai.

It's a fun cultural experience when you compare it to the throngs of folks waiting for a random sunday brunch in SF or NYC, and the omakase menu was utterly outstanding.

I've also had the great fortune of securing a reservation at Sukiyabashi Jiro Roppongi Hills (the son of "Jiro Dreams of Sushi"). The meal was extraordinary, but the formality of being watched during every bite (and scolded for holding my chopsticks at a angle instead of perfectly horizontal) meant that Sushi Dai was actually a more enjoyable experience even with the wait.

Just my two cents.