I used to go to Sin City when it was located on Eastern and Serene. The new location is a welcomed upgrade to a sushi spot that was already hitting the right notes food wise. They have a reasonably priced AYCE option and the food is always well prepared. I enjoy the side board that they use for seasonal/limited items that are available in addition to the menu. I also notice that the owner seems to be very active in the business. Always a good thing.
The only negative is that the service can be slow and the serving staff seems to get things confused often. It occurred a couple times on my last visit in the beginning of January. Not a deal breaker at this point, but there is room for improvement. Nevertheless, staff were friendly and helpful.