My family had their doubts, but I managed to convince them to try fusion--given that we are both Japanese and Mexican.
At first the service was slow: the restaurant seemed empty, the food hadn't come out, hardly anyone was visible in the kitchen...it didn't look good.
But as soon as the food began to come out, we were amazed at the development of flavors and special flair in every dish that made it fusion. Even dishes that weren't specifically advertised on the "fusion" part of the menu.
I come to Phoenix from LA to visit family every year and would definitely come back to El Tataki. However, be wary that service could be a while--but I assure you that it's worth the wait.