I've been to Stratus twice for business breakfast, and it is the perfect spot for just that. The view is absolutely stunning. To sit and watch the planes take off from Billy Bishop while you chat about work is a great way to start the day.
Considering the location and the clientele, I was actually really surprised how cheap it was. Breakfast for three, with multiple rounds of coffee, came to C$70 including tax and tip. The food was lovely, and the espresso was quite decent. One of the better ones I've had in Toronto.
The service was a little slower the second time I went than the first, but we were also there a bit later (9:30 instead of 8:00), so it may just have been that.
Would recommend for sure!