4 stars for lunch, 3 otherwise.
Yamato has some pretty cool teppenyaki lunch specials, most will cost no more than $15 including tax and tip. Not bad. We often take new hires at my company here for a "welcome" lunch, mainly because it will satisfy even picky eaters. (You can't go wrong with grilled meat, veggies and rice)
Service at lunch is fast, you can definitely order, dine, pay and be outta there within an hour.
I don't find the teppenyaki chefs that entertaining. I've seen much better, but not in Toronto. I suppose if it's your first visit, it will likely impress. After numerous visits, it becomes boring.
They do have really good sushi here too. The rainbow roll is freaking amazing.