Oh sushi one! Great prices (especially their lunch specials), good sushi, hilariously bad service. I always get the same lunch special, but half the time the bring it after all my friends are already finished their food or they bring me the wrong one (and one that contains fish, which I don't eat). Staff is disinterested and standoffish. But this is one place that I don't mind the bad service. It's actually quite entertaining and part of the overall experience. My friends and I like to see whether they'll bring me the right order or whether I'll get my food at all. My one friend and I would randomly yell out "Sushi One!" in amused amazement throughout our meal whenever there was a typical bad service moment, with a loud one at the end in surprise when they actually brought us our bills in a timely manner.
The lunch specials are great - $7.50 for 2 sets of maki rolls, a salad and a miso soup or for teriyaki. The tofu teriyaki is tempura silken tofu as opposed to fried tofu (I prefer fried tofu in my teriyaki personally).
The decor is nice and in the summer they have a lovely patio with a fountain. They do get busy busy around lunch time so come early or late to avoid the rush or get takeout and eat in the nearby park (assuming it's summer time and you can order ahead from your office).
It's one of the few places in that area to eat where there are vegan options for good prices. Don't let the service dissuade you - if you're hungry and in north york, I recommend checking it out if not just to play the "SUSHI ONE!" game.