Sushi Couture falls in that middle ground between cheapo-depot sushi (see New Gen/Sushi On Bloor) and tasty, but pricey, good stuff (see Japango, Solo Sushi).
Decor is lounge-y, music choice was definitely very Kenny G.-inspired.
Sushi prices are reasonable - a sashimi dinner and a couple of maki rolls were plenty for 2 people to share. Service is friendly and attentive.
In short: if you're in the mood for sushi, aren't looking for a particularly "special" experience, it's a nondescript weekday, but are also suspicious of ridiculously cheap fish, Sushi Couture is a good option.