I went there for lunch with 6 others on a Friday afternoon around 12:30. The place was pretty busy and we sat outisde in the back, which was pretty nice.
I ordered the Spicy Sushi set which wasn't bad for $10.95 (came with 12 pieces and a hand roll). My co-workers ordered simliar items.
i gave it 3 stars because the service was pretty slow - as in, it took us an hour to get our food (otherwise, it would've been a 4). The waiter came by to inform us that they were really busy (as evident by the packed outdoor area where we were sitting). But by the time our food came, about 75% of the tables surrounding us had left.
I would give it another chance as I was satisfied with my meal. However, there are so many sushi options around the Yonge/Bloor area that I wouldn't go out of my way to eat @ Asahi.