Small and dependent on temporary exhibitions
Like many of the other reviewers when I first visited this museum back in November I was expecting much, much more given the size of the building and my experiences visiting other contemporary art museums around the world. However, I was quite impressed with the exhibition of the works of Patrick Bernatchez.
And so on my latest visit to Montreal I thought I would try again. On the positive side they offered a discounted entrance fee due to the scarcity of exhibits. On the negative side the video installation was just sort of good-ish and worth about 45-60 minutes of your time.
So my advice would be to plan on visiting...but to look on the web (or phoning ahead) to see if you feel it is worth your while. Also, note that on Wednesday, Thursday, and Friday the museum has odd hours - 11AM to 9PM.