Fast food sushi? Yes, this place nails it. Sushi Shop is hands down the best fast food sushi chain I have eaten at. In the downtown core/financial district, no place even comes close. Step aside, Bento Zushi, Umi Sushi Express, and all you other pathetic places.
At Sushi Shop, the sushi is very well made. Ingredients are fresh. Ratio of rice to filling is excellent and generous. And service is pleasant. Having a brown rice option is also a plus. Note that I typically order items off of the menu, so I don't know how good their premade to-go lunchboxes are.
Another great thing is that their soy sauce comes in a little dipping box, unlike the other places where you squeeze the sauce out of some packet onto the tray and hope that it keeps together enough for you to dip your sushi. This makes the whole experience so much better. The one drawback to this particular location is that it's located in Union Station. That place is grimy, and I have a general distrust towards any food establishment there (I shudder to think of what the McDonald's back kitchen/storage looks like).