This isn't the Ramen I lived on in University. Sumo Ramen is one of my favorite lunch and late evening places. When I worked in the old port I would wonder over at least once every couple of weeks for a cheap, fast and easy lunch.
Sumo Ramen has an extensive menu with something for every palette, from the veggie Gyoza's to the multiple meat and broth choices and the bubble tea who can forget the bubble tea, my favorite! Now keep in mind this is not fancy Japanese cuisine, it's good lunchtime or quick evening fare. If you're looking for higher end Japanese food give http://www.yelp.ca/biz/imadake-pub-japonais-montreal or even http://www.yelp.ca/biz/kazu-montreal, I promise you won't be disappointed. But for a quick lunch Sumo Ramen won't disappoint.
The service here is like it is at most places in Chinatown quick and efficient but don't expect allot of conversation. My only complaint and the reason why I only gave them three stars is that once you've place your order it sometimes very difficult to get someones attention if you want something else. Other then that the service is adequate, specially considering what your lunch will cost.
Give this place a try if your in the neighborhood and need a place to stop for lunch give Sumo Ramen a try it's worth a try.