Fish aside, the rice is what makes good sushi. Sushi masters in training work on making rice for a year or something before they get to touch ANYTHING else (it might even be two... I don't really have the facts in front of me) so it's obviously important. I don't eat fish but I can tell you Roku has the best sushi rice of anywhere I've eaten in Calgary. The downside for me is they have a more limited menu for fishless sushi than some of the other sushi places but they have the old standards and they are pretty good. I also can't eat the miso which is also disappointing.
Moving away from sushi they have some interesting other dishes like eggplant with tamarind sauce. Different, good but I'm not sure what I think of the texture. Even still, it's not something i've seen elsewhere and is something I can eat so there is props for that.
Much of the staff speak japanese and are patient and indulge hubs as he's learning in preparation for an upcoming Japan trip. Luckily they speak english to me as I'm completely lost. :)
Lunch combos are a pretty good deal if you're not a vegetarian... you can mix and match sushi and cooked food.
Overall nice restaurant but the bill gets big quickly it seems.