I'm young and still prefer renting DVD's over Netflix or Torrents. I find they have much more selection and I always leave with a couple of movies that I wouldn't find on Netflix. There's always a lot of young people browsing, so I am assuming the generation that has cut cable is what is keeping them alive. With Blockbuster gone and Rogers slowly disappearing, I think they have their own little niche market that can potentially keep them in business for quite some time.
It's quite out of the way for me, yet I still visit and rent from them. I used to use Mr. Movie on Mutual Street but it closed down several years ago
7 & 24 has much better selection though!