I've had Qdoba a couple of times and am starting to grow a liking for it. Their burritos come with other toppings that aren't available at Chipotle. A huge plus is their queso burrito. They also offer more types of food, such as soups, quesidillas, and nachos, and more meats.
Another added bonus is that they make breakfast burritos in the morning, which is awesome for those early morning classes. I have to admit that I'm becoming a Qdoba fan with each and every visit.