Main Sushi is my go to sushi place in Markham; I've tried a few others but I always end up back at Main. Their food is good, I love the spicy chopped scallop sushi, and the bbq beef skewers are great. I always get a spicy tuna, spicy salmon, and dynamite roll and 9 times out of 10 it's delicious. Occasionally it's not quite right (I can't tell you why, just there's sometimes an after taste that's not great) but I think that's true of anywhere you may eat.
I cannot praise the staff enough, they are wonderful. Super friendly, and very fast. The lady who I think must run the place is great. Honestly, I'll keep coming to Main because of the staff, they're that great.
The prices are reasonable for an a la carte sushi place and I always feel I've gotten my money's worth.