We came here on Free Museum day in Montreal and the lines were redonks! We kept getting fooled after turning a corner and seeing more and more of the line before we could get in! We ended up waiting about 45 mins on line - but it was free!
Since there were SO MANY PEOPLE, we were forced to join a slow moving line of people through the rainforest (which is disgustingly humid, btdubs), before we decided to cut away from the pack and book it to the penguins.
The penguins are sooooo freaking adorable! Aside from being my favorite animals (and they are always dressed so smartly in their tuxes), they love to ham it up for the cameras! A lot of them swim super close to the glass & I even spotted one in the corner, basking in the glory of the camera flashes ;)
The biodome was cute, but aside from the penguins I wouldn't really see a reason to come here OR pay admission.