Moira has grown on me. They aren't my favorite sushi in the the Valley, but they certainly try to be! Their location is much welcome in the Downtown Phx area.
Now, I am a sushi snob, so I don't think they have the freshest cuts or the most creative menu. I do think that if you're downtown and craving sushi, (especially late night) they get the job done.
If you want a really good bargain, hit their happy hour and reverse happy hour. You can eat a ton of sushi on the cheap and go home satisfied. If you're there for happy hour, try the White Blossom and the Vegas. Both rolls are not very "authentic" or "traditional" but both are very tasty. Off of their regular menu, I suggest you try their hamachi yellowtail sashimi with a side of Sriracha, the Sunshine roll and the Spicy Hana roll are both good choices too.
Moira offers many exotic mixed drinks to tempt your palate into trying something new, but be careful of the prices. The drinks can run anywhere from $7 -$10 and add up quickly.
If you're downtown and don't feel like driving far or detouring from the light rail, go to Moira for your sushi fix. They have some solid choices for your sushi craving.