Sumo has a special place in my heart. When I'm craving AYCE sushi, Sumo is there for me and they open late and offer my favorite dishes such as green dragon, dynamite, and pretty much the basics such as tempura, teriyaki chicken, and more. It's a shame they don't have more customers because I think they do a good job.
The quality of food is quite good. Dishes came out fast and they have a decent menu, but I'm guessing the lack of patronage is because of other places such as Matsuda and Kiku. They have higher prices, but much more variety and slightly better quality. Sumo is a good option for AYCE sushi that is cheaper than other Markham AYCE ($25 here if you pay cash compared to $35). One of my favorite dishes here is the blow torched shrimp which is to die for. So addicting.
Service is very good. We usually get this waitress in the evenings and she's very nice and attentive. I wish they did a AYCE lunch service but at a lower price because at the moment it's the same price as dinner. I also think dessert is lacking. It's uninspiring and not as tasty.
4/5. Sumo is one of my favorite sushi places where I don't blow a budget and satisfy my sushi cravings. They have issues to work out but I like Sumo.