Sushi Couture is a welcome step up from the generic cheap sushi places on Bloor (New Gen, Sushi on Bloor, etc).
The sushi is much better than the generic Bloor places, both in freshness and preparation. As others have mentioned, the chef and one of the servers are from Japango, and the food is very comparable, down to the melt-in-your-mouth seared butterfish and BC tuna. It's Japango quality, but with enough seating that you can walk in without a reservation.
I usually get the deluxe sushi dinner or a chirashi box (and to whoever complained about the bed of rice included in the chirashi box - that's how chirashi is supposed to be made).
The service has always been impeccable when the ex-Japango waiter (bald/shaved head gentleman) is serving us; it can be a bit slower otherwise, but certainly nothing to complain about.
The prices are very reasonable, e.g. $16 for the sushi dinner - frankly I'm surprised you can get such good quality for only a few bucks more than the cheap places.