I have been to OPUS about 4-5 times now for dinner. Their wine list is amazing, and the cellar downstairs is just beautiful. I beleive they are one of the restaurants in the world that has such an extensive wine list--and that's impressive. Please try the chateauneuf du pape......incredible.
The food: the steak tartare is good, the salads a bit bland . The gnocchi is GREAT..very filling though so watch out! The meat mains have been good, but i would not say the MOST memorable plates. Make sure to get the creme brulee!!
The bar at the front as soon as you walk in gives the place a cool yet very classy atmosphere. The martinis are very good, and I would suggest dropping by for a drink even if you are not going to have a meal.