It used to be so I can only go by when we lived in the area, twice actually in the suburbs. At that time it was a safe and clean city although in general I don't do cities which is why I enjoyed the numerous Parks in and around TO.
Don't go because you hope the 'grass is greener' there because it won't be. Been there, done that. You need a good, well-paying JOB and an open mind so you can absorb all another country has to offer.
I would say, looking at what's happened there and area, since we left, the population has to have exploded. Too many small towns around Toronto have undergone a building explosion. In other words, do your homework - and if that means visiting short-term before committing, do it.