Corner Alley is pretty popular around the city. My boyfriend and I have been there two times. The first time, we only had drinks. We both ordered a Long Island Ice Tea, but both were very weak and very sugary. The second time we went we had the garlic parmesan fries which were actually really really good! We also each had a burger which weren't bad, but also nothing special.
Both times we went to Corner Alley it was really cramped. You're sitting elbow to elbow with other parties and it's difficult to have a conversation without feeling like you're being listened in on. It's even hard to get into your seat without bumping those around you.
Overall it's okay. We might be back because I live down the street, but it's not a place I'd recommend to friends over other places downtown.