The Sushi Shop inside Glen Hospital is my favorite. Since I work at the hospital, I've had lunch here many times and the quality has been consistently good. What I especially like about this location is that they don't skimp on the fish. Their sushi are loaded with the good stuff! Also, they're open later than the cafeteria and many other restaurants inside the hospital so that's pretty convenient.
The staff is very friendly here. If they're not too busy they'll even offer to heat up tempura shrimps and other premade items that are usually eaten warm. Most of the time there are many premade plates (which is what I always go for) and it tastes fresh and delicious. I eat here once or twice a month and have never been disappointed.