I've been hunting this truck down all summer! Check their Instagram for daily updates for where they are in the city. It was about $9 for half a burrito which filled me up to the equivalent of 2 sushi rolls. It gets a little messy since you have to pour the soya sauce onto the burrito. I opted for the spicy salmon burrito and there was a good ratio of salmon and rice.
Sushitto is something you need to try at least once! A great choice if you're in a rush and don't have time to sit down at an AYCE sushi restaurant.