This is one of the better sushi places I've been to. It's in a good area - not too far from downtown, not too far from my lovely Finch station.
In the summer you can sit on the patio and they have cheap(er) Sapporo which is a big plus since that beer is 'spensive errywhere else.
My most most most favorite thing (s) about Sushi-O were the squid tentacles. It was kind of like calamari but not really, they were dipped in some kind of light tempura coating and fried to per-fish-ction!
The sushi (maki rolls, I don't actually like sushi sushi - if I wanted to eat rice I would stay home. If i want to eat a piece of raw salmon, I'll order sashimi. I don't understand the point of having a piece of rice with a piece of fish, when you can just have the fish and enjoy is twice as much. rant over! moving on.) were a-ok. The rice around it seemed very stiff and very "square looking"... does that make sense? It was too tightly wrapped, and there was only one outter layer of rice. So it made me feel like they pre-make these rice rolls with empty holes and then just stuff the fish inside, assembly line style.
The service was really slow the last time we came, portions were super small. Squid tempura rings were kind of tiny also :(
I do think that if you're in the area and craving sushi, this may be one of the better places to go. They have 10% discount days (i think Tuesday or Thursday) and get pretty busy around lunch dinner so make a rezzie!!