BLT gets a 5-point rating simply on the basis of their Chicago Wrap. The days when it is off the menu, I'm a bit less happy but still quite happy. The Chicago Wrap is a piece of garbage food perfection, something like a happy marriage between a pepperoni pizza and a chicken burrito. Sounds like it wouldn't work on paper, but it is seriously tasty and a good portion too.
One of the best aspects of BLT is the crazy crowded atmosphere at lunch and the ordering system - essentially you just squeeze in and yell your order like you're a Wall Street stock trader. If you want one of the daily specials, they are usually making around 12 of them at a time, so you can often get one really quickly. Addictive, delicious, and cheap - a good combo.