I've been eating at Boustan for about 10 years when I have the opportunity to be in Montreal. This place is not some shitty tourist place as some people I know have denigrated it. This place is legitimate in every way. Yes, it's on Crescent Street and Boustan has a huge advantage from tourists in this location. Boustan's food stands on its own, though, and is not influenced by anything other than a commitment to fresh, delicious ingredients which afford every customer with a symphony of flavors while adhering to tradition.
I recommend Restaurant Boustan in the strongest way possible.