Overall, OK - for the price to food is good value, but don't expect high quality delicious Japanese from this place.
I got a delivery order from Sushi Supreme, it was done through just-eat.ca so I can't comment on the over the phone service.
Everything I ordered came without issue. Prices seem slightly below average for Japanese/sushi in the downtown core
Gyoza
Spring Rolls
Crunchy Spicy Salmon Roll
Beef Teriyaki Sushi Bento Box
Everything was very much standard fare, I found all of the fish apart from the Salmon to not be very fresh, still very much edible though. The beef in the Teriyaki was somewhat tasteless but cooked properly. Spring Rolls were not soggy and had decent flavour. Rice was decent...
If you are hungry, on a tight budget, and not picky about sushi quality, this is a decent place to go, otherwise, there is better in downtown Toronto.