Everyone at Yummy Sushi is always super nice. I've been there 3 times since moving out to Vegas 2 months ago. My fiance and I always get a HUGE hello when we walk in and the first time we were there we were bombarded with free food.
We went their for lunch the first time and were given scallion pancakes as an appetizer and some chef special roll that was tuna and crab covered in tempura flakes and deep fried with a spicy and sweet sauce. It was amazing! AND FREE.
The last time we went, we were there for dinner and the place was packed. We sat at the bar and hung out with the sushi chefs who were cool guys and handed us coupons before we left.