My wife and I went to this place while we were on vacation in Montreal. When we travel, we try our best to avoid Starbucks, and support local coffee shops instead. We found Cafe Plume on a website's list of top 5 coffee shops in Montreal (http://canadanightlife.ca/2014/01/5-best-coffee-shops-in-montreal-2014/).
This place did not disappoint. The service was on point. The guy was even patient with us and helped us when we were indecisive on what we wanted to order. The pastries were good. We order donuts with caramel and nuts on top which were delightful. The coffee was good. It was just as good or better than Starbucks. So we were happy about that.
The ambiance was cozy with local art on the wall and contemporary decor. There also were quite a few locals there. I would definitely be a regular here if i lived in the area. Overall, this was a nice local place to get coffee and snacks. So If you're in the Plateau area, and you need your coffee fix, stop by this place for a cup.