It's hard to review this restaurant. Probably because almost every negative and positive comment you'll read is true. But please consider what this restaurant is: one of the busiest AYCE places in Toronto and it's intended to be a cheaper-end sushi place.
This is the second Aji Sai location I've visited for AYCE and it was quite delicious. They have a great selection of rolls and the quality of their fish is not too shabby. The pricing is pretty decent, but I would recommend that you go to this place for their AYCE rather than their meals or individual rolls.
Fair warning, this place is busy as hell and not necessarily the most organized. While you could tell that the host was trying his best to keep everyone waiting to be seated and balance his other responsibilities, he was being overwhelmed. The waiters and waitresses are fairly friendly but the service is slow.
The decor at this Aji Sai is pretty nice. All and all, if you want a decent selection of sushi at an AYCE and don't care too much about service, this is the place to go.