So here's the skinny on Sushi Roku. It's overpriced (welcome to Vegas!), better-than-good-but-not-great food with a very nice view of the Strip. Did we enjoy the meal? Yes. Would we go back? Probably not.
I would recommend getting a window seat, especially in the evening, when the lights are up.
Service was mixed; the greeter / host was really nice and engaged, but our waiter was somewhat absent. It seemed he was covering a lot of the floor himself, but still.
The sushi itself was very well presented. We got the chef's selection, which had some intriguing and tasty combinations - I'd recommend going that way. Oh yeah - the Wagyu pot stickers are almost worth another star by themselves.
So -- not a place to avoid, or one to seek out particularly.