I've been here a few times now have to say that ramen in Toronto is pretty decent these days. Isshin has become the go to in my neighborhood.
I've tried both the spicy red miso ramen and the roasted garlic & shallots ramen. The spicy red miso isn't really spicy at all but the wok fried pork and vegetables are nice and different than other ramen places. I think I prefer the roasted garlic ramen though. The taste is less busy and simpler and I really like the personal mortar and pestle that they give you for the black sesame. Plus I like the half egg that it comes with :) Ramen isn't ramen to me unless it comes with a half semi hard boiled egg.
I say stick with the basic Shoyu Rammen and you won't be disappointed. I also tried the karaage and it was pretty good but I think karaage from the other places are pretty good too. Hard to mess up chicken nuggets, no? Last time I went on a week night and it busier then I expected so they're doing something right.