I find that Montreal is lacking in the salad/health restaurant department, so if you want a healthy yet satisfying meal, Mandy's is the place to fill that void. The lack of competition probably explains the somewhat outrageous prices, which is my only drawback.
That being said, service is friendly and the atmosphere is incredibly welcoming. The outdoor seating area is also a huge bonus.
I'd recommend it if you are willing to splurge a little for a healthful meal experience.