I have been coming to this Mr. Sub since I was a kid. It has instilled upon me the ideology that Mr.Sub is superior to Subway. Mr.Sub tastes what a sandwich is supposed to taste like, whereas Subway tastes like a fake sandwich.
This location is across from UHS, and so I'm sure they get a lot of business from those high school students. Fortunately, their student discount extends to university students as well - you just need to flash your student ID to the owner and you can get a 6" sub + pop for $5.
Personally, I enjoy their classic assorted cold cut combo sub - you can't go wrong. Add some fresh veggies, mayo, and sub sauce and you get the perfect sub.