Liked it! It's in the W hotel and my first trial of this chain. The decor is great and I loved the large tables.
Sushi quality was very good. I still prefer Nobu, but this chain is very comparable. I had the usual mix of what I like: edamame beans, unagi sushi, a sashimi mix, rolls and their rock shrimp. I first fell in love with rock shrimp at Nobu, and I think Sushi Roku does a very good version of it! Tasty and good sized potions. The fish has a nice flavor and texture. The rolls were good quality - we had a spicy salmon roll (not on the menu but they allowed the subsitution), tuna toro with jalapeno, and a dynamite.
This place is pricey but I was happy with the meal and service and would return.