To me, Dangerous Dan's is kind of like Transformers: one of those critic-proof entities that everyone is going to go to, regardless of whether or not it's actually any good.
So what can you say about a place like that? DD is not friendly, comfortable, or even a really good diner. But the sandwiches and burgers are decent, the fries and salads pretty solid.
It's certainly a Toronto institution, and it's been called the most unhealthy restaurant in the city. So it's worth checking out if only to see what all the fuss is about -- just like Transformers.
Mostly, what DD has going for it is that it's there. Sometimes, that's enough. In this case, it's enough for a three-star review.