Sony MDR-NC11

Pros: It does what it says on the tin. Like the nc5 they cancel low frequency noise but not high frequencies. I'm tired of people who say that they don't work when they clearly let me watch DVDs on the train in the morning when previously I would be blasting my

Cons: not the highest fidelity I must admit and does introduce some noise of it's own. But when you're using these in a noisy environment who cares anyway?