I come here all the time with other OCAD students, it's busy around peak hours but fairly quiet sometimes during off-hours too.
Food is great, servers are super friendly, they start to remember your regular order after a while (if you come as often as we do haha), seriously though, they're really (consistently) humble, kind, and hardworking people. Prices are fair, good for students especially!
The place is a bit small but its very warm and nice in the winter. A bit of a bummer cause there's no AC in the summer (from my experience) and it gets pretty hot but you can take your bowl and eat outside in the food court.
Definitely recommend the curry udon or niku udon, and add on the combo and try the takosen!